Effect of Bioslurry from Fixed Dome and Tubular (Flexi) Biodigesters on Selected Soil Chemical Properties, Maize (Zea mays) Growth, Yield and Quality

Agricultural utilization of bioslurry plays a critical role in soil conditioning and hence crop production. It also reduces greenhouse gas emissions thus mitigating climate change. Although the effect of bioslurry on growth and yields is well researched, that of different biodigester types is under-researched. Therefore, a study was carried out in Waruhiu Agricultural Training Centre, Githunguri sub-county, Kiambu county in Kenya, to investigate the effect of bioslurry from flexi and dome biodigesters on soil chemical properties, maize growth, yield and grain quality. Treatments were laid out in a Randomized Complete Block Design (RCBD) and replicated three times. The treatments were bioslurry from both Fixed Dome and Flexi biodigesters, applied separately at a rate of 400mls per hill as basal and top dress fertilizer. Planting was done during the 2019 short and 2020 long rains, using Duma 43 maize variety. The agronomic (germination percentage, number of leaves, leaf width, leaf length, plant height) and productivity data (stalk, stovers, grain yields and grain quality) were subjected to analysis of variance (ANOVA) through Proc general linear model (GLM) procedures. Mean separation was done using least square means (LS-Means). Results showed an increase in soil pH, total N and OC, exchangeable P, K, Mn and Na in both biodigester types. Total N and OC were higher in Dome treated soils by 38.89% and 37.00%, while in Flexi, it was 16.67% and 16.00% respectively. Exchangeable P and K was higher in Flexi treated soils with a 38.57% and 50.00% increase while in Dome it 37.86% and 47.22% respectively. Magnesium and Zn decreased after treatment by 34.30% and 22.59% in Dome while Flexi had 33.23% and 31.79% increase. Exchangeable Fe and acidity decreased in Dome but increased in Flexi treated soils. No statistical differences were observed on growth and yield parameters but Dome registered higher grain yields by 9.4% and 6.3% for short and long rains respectively. Flexi treated soils registered higher values in most grain nutrient content such as K, Fe, Cu, Mn and Zn in short rains and P, Ca, Fe, Cu, Mn and Zn in the long rains. Bioslurry from both biodigester types variably increased the evaluated soil chemical properties but decreased Mg and Zn. Despite the numerical differences noted between bioslurry from both biodigester types on maize growth and yield, there was no significant difference (p≤.05). However, Dome bioslurry increased N, OC and maize grain yield more while exchangeable P and K and most of the grain nutrient content were higher in Flexi treated soils. Therefore, bioslurry from either biodigester type can be used in enhancing soil conditions, growth, yield and quality of maize. However, a long-term experiment is required validate the findings.

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MgO Fertilizer Sole and Combined with Organic and Inorganic Fertilizers: Effect on Soil Chemical Properties, Turmeric Performance, and Quality in a Tropical Alfisol

The Scientific World JOURNAL ◽

10.1155/2019/8140276 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Aruna Olasekan Adekiya ◽

Elizabeth Temitope Alori ◽

Christopher Muyiwa Aboyeji ◽

Oluwagbenga Dunsin ◽

Kehinde Abodunde Adegbite ◽

...

Keyword(s):

Nutritive Value ◽

Field Experiments ◽

Curcuma Longa ◽

Poultry Manure ◽

Chemical Properties ◽

Growth Yield ◽

Soil Chemical Properties ◽

Growth And Yield ◽

Yield And Quality ◽

Number Of Leaves

For soil fertility maintenance, secondary nutrient such as Magnesium (Mg) is always being neglected. However, its role is critical in the growth, yield, and quality of crops. Therefore, two field experiments were initiated in 2017 and 2018 to evaluate the response of soil chemical properties, performance, and qualities of turmeric (Curcuma longa L.) to Mg fertilizer alone and in combination with poultry manure (PM) and NPK 15-15-15 fertilizer (NPK). The treatments applied were the following: (i) PM alone at 8 t ha−1, (ii) NPK alone at 200 kg ha−1, (iii) Mg fertilizer alone (in form of MgO) at 20 kg ha−1, (iv) PM at 8 t ha−1 with MgO at 20 kg ha−1 (PM + Mg), (v) NPK at 200 kg ha−1 with MgO at 20kgha−1 (NPK + Mg), and (vi) control (no amendment of any kind). PM, NPK, and Mg fertilizers alone or NPK + Mg and PM + Mg increased soil chemical properties, performance (plant height, number of leaves, number of tillers, number of rhizomes, and fresh rhizome weight), and minerals and vitamins C and A contents of turmeric rhizome compared with the control. By averaging 2017 and 2018, Mg fertilizer alone increased the yield of turmeric by 10.8% compared with the control. For this experiment, NPK + Mg increased growth and yield of turmeric compared with other treatments. Also, averaging 2017 and 2018, NPK + Mg increased rhizome yield of turmeric by 13.6% and 10.6% compared with PM + Mg and NPK alone, respectively. Similarly, PM + Mg significantly improved mineral and vitamins contents compared with other treatments. Therefore, for those that desire turmeric rhizome for its nutritive value, PM + Mg is recommended. For those that want quantity, NPK + Mg is recommended.

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Pengaruh bahan organik berbasis gulma paitan dan pupuk NPK terhadap sifat kimia tanah, pertumbuhan, dan hasil tomat pada Ultisols

Kultivasi ◽

10.24198/kultivasi.v18i3.21140 ◽

2019 ◽

Vol 18 (3) ◽

Author(s):

Intan Abas Nur Khairunnisa ◽

Anung Slamet Dwi ◽

Sapto Nugroho Hadi

Keyword(s):

Chemical Properties ◽

Soil Chemical Properties ◽

Growth And Yield ◽

Tithonia Diversifolia ◽

Fresh Weight ◽

Total N ◽

Npk Fertilizer ◽

Screen House ◽

Total P ◽

Range Test

Sari. Penelitian ini bertujuan untuk mengetahui pengaruh bahan organik gulma paitan dan pupuk NPK terhadap sifat kimia tanah (C organik, N, dan P total), serta pertumbuhan dan hasil tomat pada Ultisols. Penelitian dilaksanakan di screen house Fakultas Pertanian, Universitas Jenderal Soedirman, Purwokerto, pada bulan Juni sampai September 2018. Penelitian ini menggunakan rancangan perlakuan faktorial 3x3. Faktor pertama adalah bahan organik tumbuhan paitan, terdiri atas 3 taraf, yaitu 0, 125, dan 250 g/tanaman. Faktor kedua adalah dosis NPK, terdiri atas 3 taraf, yaitu 0; 3,61; dan 5,42 g/tanaman. Seluruh kombinasi perlakuan dialokasikan ke dalam unit percobaan dengan menggunakan Rancangan Acak Kelompok yang diulang 3 kali. Variabel yang diamati meliputi C organik, N total, P total, serta pertumbuhan dan hasil tomat. Data dianalisis dengan uji F, dilanjutkan dengan Duncan’s Multiple Range Test. Hasil penelitian menunjukkan bahwa bahan organik tumbuhan paitan dengan dosis 250 g/tanaman cenderung memperbaiki sifat kimia tanah, serta berpengaruh terhadap pertumbuhan dan hasil tomat seperti jumlah daun, luas daun, bobot segar buah per tanaman sebesar 43,29% dari kontrol, dan jumlah buah sebesar 54,26% dari kontrol. Pupuk NPK dengan dosis 5,42 g/tanaman cenderung berpengaruh terhadap sifat kimia tanah, serta berpengaruh nyata semua variabel pertumbuhan dan hasil kecuali bobot segar akar. Kombinasi bahan organik tumbuhan paitan dengan dosis 250 g/tanaman dan pupuk NPK dengan dosis 5,42 g/tanaman cenderung berpengaruh terhadap sifat kimia tanah dan berpengaruh nyata terhadap variabel luas daun.Kata Kunci: Tithonia diversifolia, pupul NPK, Tomat, Ultisols Abstract. This research aims to know effect of organic matters of Tithonia diversifolia weeds and NPK fertilizer to soil chemical properties (organic carbon, total N, and total P), growth, and yield of tomato in Ultisols soil. The research was conducted at Screen House of Faculty of Agriculture, Jenderal Soedirman University, Purwokerto regency, from June to September 2018. This research used 3x3 factorial treatment design. The first factor was the dosage of organic matters of Tithonia diversifolia, consisted of 3 levels: 0, 125, dan 250 g/plant. The second factor was the dosage of NPK fertilizer, consisted of 3 levels: 0, 3.61, and 5.42 g/plant. All of treatment combinations were allocated to the experimental unit that used Randomized Block Design and was replicated 3 times. The variables observed were organic C, total N, total P, growth, and yield of tomato. Observational data were analyzed by F test, then Duncan's Multiple Range Test. The results showed that dosage 250 g/plant of organic matter of Tithonia diversifolia improved soil chemical properties, and affected significantly to growth, and yield variable likes number of leaves, wide of leaves, number of fruit, and fruit fresh weight. Dosage 5.42 g/plant of NPK fertilizer improved soil chemical properties, and affected significantly to all variables of growth, and yield, except root fresh weight. Combination of Tithonia diversifolia organic matter dosage 250 g/plant and 5,42 g/plant NPK fertilizer improved soil chemical properties and affected significantly to leaves area.Keywords: Tithonia diversifolia, NPK fertilizer, Tomato, Ultisols

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Effects of boron and vermicompost on growth, yield and nutrient content of Chilli (Capsicum annum L.)

Journal of Biodiversity Conservation and Bioresource Management ◽

10.3329/jbcbm.v6i1.51329 ◽

2021 ◽

Vol 6 (1) ◽

pp. 31-36

Author(s):

KS Nawrin ◽

MJ Uddin ◽

AHMZ Ali ◽

MK Rahman

Keyword(s):

Leaf Area ◽

Growth Yield ◽

Dry Weight ◽

Nutrient Content ◽

Growth And Yield ◽

Nutrient Concentrations ◽

Nutrient Accumulation ◽

Total N ◽

Capsicum Annum ◽

Total P

The effects of boron (B) and vermicompost (VC) on growth and yield of Chilli (Capsicum annum L.) and nutrient accumulation in its fruits was examined. The highest plant height (22 cm), leaf number per plant (73), leaf area (502.53 cm2/plant), dry weight (22.27g/plant), fruit length (8.97cm), fruit number per plant (6), fruit yield (11.76 g/plant) were recorded in B0.5 kg/ha + VC5 ton/ha at harvest. The results of growth and yield of Chilli varied significantly (p<0.05) and increased with time. The total nutrient concentrations in the fruits were measured and varied significantly (p<0.05). The highest concentration of total P (0.028 %), K (2.50%), S (0.20 %), Cu (8.0 mg/kg), Fe (410 mg/kg) and Mn (0.80 mg/kg) in the fruit were observed in B0.5 kg/ha +VC5 ton/ha treatment and total N (0.41 %) and Zn (3.50 mg/kg) were found in B1.5 kg/ha + VC5 ton/ha treatment. The overall best growth, yield and nutrient accumulation in the fruits of Chilli was achieved in B0.5 kg/ha + VC5 t/ha treatment. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(1): 31-36

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Effects of Split Application of Urea Fertilizer on Soil Chemical Properties, Maize Performance and Profitability in Southwest Nigeria

The Open Agriculture Journal ◽

10.2174/1874331502014010036 ◽

2020 ◽

Vol 14 (1) ◽

pp. 36-42 ◽

Cited By ~ 2

Author(s):

Oluwaseyi I. Ogunboye ◽

Aruna O. Adekiya ◽

Babatunde S. Ewulo ◽

Adeniyi Olayanju

Keyword(s):

Block Design ◽

Chemical Properties ◽

Growth Yield ◽

Fertilizer Application ◽

N Fertilizer ◽

Soil Chemical Properties ◽

Growth And Yield ◽

Cost Ratio ◽

Split Application ◽

Southwest Nigeria

Background: Since N fertilizer applied to maize (Zea mays L.) is prone to loss by leaching, it is important to derive an application time during the phenology of maize when the fertilizer is most efficiently and effectively used by the crop with minimal losses. Objective: Hence, experiments were carried out in 2014 at two locations in Osogbo southwest Nigeria to determine the effects of split application of N fertilizer on soil chemical properties, maize performance, and profitability. Methods: The treatments were: (i) control, (ii) 120 kg N ha-1 Applied at Planting (AP), (iii) two split applications (SA) of 120 kg N ha-1 {90 kg N ha-1 applied AP + 30kg N ha-1 at thirty Days After Planting (DAP) [90 + 30]}, and (iv) three SA of 120 kg N ha-1 {60 kg N ha-1 applied AP + 30 kg N ha-1 thirty DAP + 30 kg N ha-1 at tasselling[60+30+30]}. The four treatments were arranged in a Randomized Complete Block Design with three replicates. Results: Results indicate that at both sites, SA three times (60+30+30) has the most improved soil chemical properties, growth and yield of maize relative to other methods. The yield parameters increased in the order: control < 120 kg N ha-1 applied once < 90+30 < 60+30+30. Using the mean of both sites, 60+30+30 increased yield of maize by 15.3%, 37.1% and 138.2%, respectively compared with 90+30, 120 kg N ha-1 applied once and the control. Optimum returns were recorded by 60+30+30 with net return of ₦ 227,600 and a benefit cost ratio of 3.67:1 while the application of 120 kg N ha-1 applied once has a return of ₦ 157,200 with a benefit ratio of 2.9. These results show that farmers would benefit by making more profit by adopting the method of SA of N fertilizer three times (60+30+30). Conclusion: Therefore, for improved soil chemical properties, growth, yield and profitability of maize, N fertilizer application should be structured in accordance with this pattern of uptake to avoid losses by leaching and therefore ensure that N level in the soil is high at the critical stage of N demand.

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Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

Annals of Tropical Research ◽

10.32945/atr39sa3.2017 ◽

2017 ◽

pp. 31-43

Author(s):

Berta Ratilla ◽

Loreme Cagande ◽

Othello Capuno

Keyword(s):

Block Design ◽

Management Strategies ◽

Chemical Properties ◽

Organic Fertilizers ◽

Growth And Yield ◽

Physical And Chemical Properties ◽

Total N ◽

Randomized Complete Block Design ◽

Physical And Chemical ◽

And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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Early Sowing Combined with Adequate Potassium and Sulfur Fertilization: Promoting Beta vulgaris (L.) Yield, Yield Quality, and K- and S-Use Efficiency in a Dry Saline Environment

Agronomy ◽

10.3390/agronomy11040806 ◽

2021 ◽

Vol 11 (4) ◽

pp. 806

Author(s):

Ali A. A. Mekdad ◽

Mostafa M. Rady ◽

Esmat F. Ali ◽

Fahmy A. S. Hassan

Keyword(s):

Plant Physiology ◽

Sugar Beet ◽

Growth Yield ◽

Sugar Yield ◽

Growth And Yield ◽

Path Coefficient ◽

Root Yield ◽

Yield And Quality ◽

Study Results ◽

Positive Direct

Field trials for two seasons (2018/2019 and 2019/2020) were conducted to investigate the influence of the addition of three levels of potassium (K) (K1 = 60, K2 = 120, and K3 = 180 kg K2O ha−1) and/or sulfur (S) (S1 = 175, S2 = 350, and S3 = 525 kg CaSO4 ha−1) to the soil, as well as the sowing date (the 1st of September, D1; or the 1st of October, D2) on the potential improvement of physiology, growth, and yield, as well as the quality characteristics of sugar beet yield under soil salinity conditions. With three replicates specified for each treatment, each trial was planned according to a split-split plot in a randomized complete block design. The results revealed that early sowing (D1) led to significant improvements in all traits of plant physiology and growth, in addition to root, top, and biological yields and their quality, gross and pure sugar, and K- and S-use efficiencies based on root yield (R-KUE and R-SUE). The K3 level (180 kg K2O ha−1) positively affected the traits of plant physiology, growth, yield and quality, and R-SUE, and reduced the attributes of impurities, impurity index, and R-KUE. Additionally, the S3 level (525 kg CaSO4 ha−1) affirmatively affected plant physiology, growth, yield and quality traits, and R-KUE, and decreased impurity traits, impurity index, and R-SUE. The interaction of D1 × K3 × S3 maximized the yield of roots (104–105 ton ha−1) and pure sugar (21–22 ton ha−1). Path coefficient analysis showed that root yield and pure sugar content had positive direct effects with 0.62 and 0.65, and 0.38 and 0.38 in both studied seasons, respectively, on pure sugar yield. Significant (p ≤ 0.01) positive correlations were found between pure sugar yield and root yield (r = 0.966 ** and 0.958 **). The study results recommend the use of the integrative D1 × K3 × S3 treatment for sugar beet to obtain maximum yields and qualities under salt stress (e.g., 8.96 dS m−1) in dry environments.

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Pengaruh Sumber dan Dosis Bahan Organik terhadap Perubahan sifat Kimia Tanah, Pertumbuhan dan Hasil Tanaman Sorgum (Sorghum bicolor L.Moench) var. KD4 di Lahan Kering Jatikerto, Malang

Jurnal Lahan Suboptimal ◽

10.33230/jlso.7.2.2018.362 ◽

2019 ◽

Vol 7 (2) ◽

Author(s):

Nur Edy Suminarti ◽

A.Y. Edy Guntoro ◽

A. N. Fajrin

Keyword(s):

Organic Matter ◽

Sorghum Bicolor ◽

Leaf Area ◽

Chemical Properties ◽

Dry Weight ◽

Soil Chemical Properties ◽

Growth And Yield ◽

Cow Dung ◽

Dry Land ◽

Total Dry Weight

Suminarti et al, 2018. Effect of Source and Dosage of Organic Materials on Changes in Soil Chemical Properties, Growth and Yield of Sorghum Plants (Sorghum bicolor L.Moench) var. KD4 in Dry Land Jatikerto, Malang. JLSO 7(2): Agricultural extensification is the right step to anticipate conditions of food insecurity. This refers to two reasons, namely (1) proliferation of land conversion activities, and (2) sorghum is a carbohydrate-producing plant that is quite tolerant when planted on dry land. The objective of this study was to obtain information about the sources and doses of organic matter that are appropriate to changes in soil chemical properties, growth and yield of sorghum plants, and has been carried out in the dry land of Jatikerto, Malang. A split plot designs with three replications were used in this study, sources of organic material (blothong, UB compost and cow dung) as the main plot, and doses of organic matter (125%, 100% and 75%) as a subplot. Soil analysis was carried out 3 times, i.e. before planting, after application of organic matter and at harvest. The agronomic observations were carried out destructively at 80 days after planting (DAP) including the components of growth (root dry weight, leaf area, and total dry weight of the plant) and harvest at the age of 90 DAP.F test at 5% level was used to test the effect of treatment, while the difference between treatments was based on LSD level of 5%.The results showed that there was a significant interaction between the source and dosage of organic matter on the leaf area and total dry weight, the highest yield was obtained in blothong at various doses. Higher yields of seeds per hectare were also found in blotong: 1.76 tons ha-1, and 1.73 tons ha-1 on 125% doses of organic matter. Blotong application is able to provide elements of N, P and K soil respectively 18.3%, 85.68% and 8.42% for plant.

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Liming Effects of Sawdust Ash and Lime on Sunflower (Helianthus annuus L.) Yield in Acidic Soil of Southeastern Nigeria

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2019/v28i530121 ◽

2019 ◽

pp. 1-11

Author(s):

C. V. Ogbenna ◽

V. E. Osodeke

Keyword(s):

Soil Ph ◽

Chemical Properties ◽

Exchange Capacity ◽

Acidic Soil ◽

Soil Chemical Properties ◽

Growth And Yield ◽

Available Phosphorus ◽

Yield Data ◽

Southeastern Nigeria ◽

Head Weight

Aim: A pot experiment was carried out to determine the effect of sawdust ash and lime (Ca(OH)2) on soil characteristics and yield of sunflower in acidic soil of southeastern Nigeria. Study Design: The experiment was laid out in split-plot design, using sawdust ash (0, 1, 2, 3, 4 t ha-1) as the sub plot and lime (0, 0.5, 1.0, 1.5 t ha-1) as the main plot. Place and Duration of Study: Study was conducted outdoors at Michael Okpara University of Agriculture Umudike, Nigeria, during the 2010 planting season. Materials and Methods: Treatment combinations were applied to the 60 buckets containing soil, mixed thoroughly and watered adequately. After 1 week of treatment application, two sunflower seeds were planted and later thinned to one seedling per bucket. Plant growth and yield data were collected. Pre planting and post-harvest soil samples were collected and analyzed for soil properties. Results: Results showed that with the exception of organic carbon there was significant effect of treatments on all soil chemical properties. Lime and sawdust ash (SDA) as single and combined treatments significantly increased total nitrogen (P=0.05), available phosphorus (P<0.010), and base saturation (P<0.012). The interaction between SDA and lime significantly (P=0.05) increased total exchangeable bases and effective cation exchange capacity, while soil pH was significantly increased (P=0.05) by single applications. The increases in soil chemical properties led to significant positive response of the sunflower. With the exception of number of leaves, other plant parameters (Plant height, stem diameter, head weight, 50 seed weight, head diameter) had significant increases for sawdust ash alone at P=0.05. Correlation studies showed positive significant relationship between soil pH and sunflower yield. Conclusion: The study showed that sunflower performed best at the combination of 3 tha-1 SDA and 1.5 t ha-1 lime producing a mean head weight of 45.4 g.

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Pengaruh Pemberian Pupuk Kompos dan Mikoriza Terhadap Perubahan Sifat Kimia Tanah dan Pertumbuhan Bibit Kakao ( Theobroma cacao. L)

Jurnal Ilmiah Mahasiswa Pertanian ◽

10.17969/jimfp.v4i3.11518 ◽

2019 ◽

Vol 4 (3) ◽

pp. 145-154

Author(s):

Vina Utami ◽

Ilyas Ilyas ◽

Munawar Khalil

Keyword(s):

Theobroma Cacao ◽

Soil Chemistry ◽

Block Design ◽

Chemical Properties ◽

Soil Chemical Properties ◽

Total N ◽

Randomized Block Design ◽

Two Factors ◽

Theobroma Cacao L ◽

Glomus Sp

Abstrak. Pemberian kompos dan mikoriza merupakan salah satu alternatif untuk meningkatkan pertumbuhan bibit kakao dan dapat memperbaiki sifat kimia tanah. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) pola faktorial yang terdiri atas dua faktor ( kompos dan jenis mikoriza) dengan pola 3 x 3 dan tiga kali ulangan. Hasil penelitian ini menunjukkan bahwa faktor tunggal kompos berpengaruh nyata terhadap N-total dan tinggi tanaman namun tidak nyata terhadap pH, C- organik, P- tersedia, Kdd, KTK, diameter batang dan luas daun. Perlakuan mikoriza secara tunggal serta kombinasi antara kompos dan mikoriza tidak berpengaruh nyata terhadap sifat kimia tanah dan pertumbuhan tanaman. Perlakuan terbaik yaitu 30 g kompos dan 10 g jenis mikoriza Glomus sp + Giga spora. The Effect of Compost and Mycorrhizal on Changes in Soil Chemical Properties and Growth of Cocoa (Theobroma cacao L.)Abstract. Provision of compost and mycorrhizae is one alternative to increase the growth of cacao seedlings and can improve soil chemical properties. This study used a factorial Randomized Block Design (RBD) consisting of two factors (compost and mycorrhizal type) with a 3 x 3 pattern and three replications. The results of this study indicate that the single compost factor had a significant effect on total N and plant height but was not significant for pH, organic matter, P-available, Kdd, CEC, stem diameter and leaf area. Single mycorrhizal treatment and the combination of compost and mycorrhizae did not significantly affect soil chemistry and plant growth. The best treatments were 30 g of compost and 10 g of mycorrhizal Glomus sp + Giga spore

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Biofumigation efficacy of spider plant (Cleome gynandra L.) accessions on nematode control in tuberose (Polianthes tuberosa L.)

NASS Journal of Agricultural Sciences ◽

10.36956/njas.v2i2.115 ◽

2020 ◽

Vol 2 (2) ◽

Author(s):

Stella Jerono Keter ◽

Samuel Nyalala ◽

Joshua Ogweno

Keyword(s):

Block Design ◽

Growth Yield ◽

Research Field ◽

Growth And Yield ◽

Yield And Quality ◽

Flower Yield ◽

Cleome Gynandra ◽

Randomized Complete Block Design ◽

Spider Plant

Tuberose (Polianthes tuberosa L.) is a perennial summer flower grown by smallholders in Kenya for export. However, its production and export volumes have declined drastically due to nematodes infestation. This study evaluated the effect of Cleome gynandra accessions on nematode management on tuberose. Experiment was conducted at the Horticulture Research Field, Egerton University, Kenya using a randomized complete block design with four replications. The treatments were: five accessions of C. gynandra namely ‘Simlaw’, ‘Egerton’, ‘Taastrup’, ‘PS’ and ‘IP8’, applied at 6 kg/m2 and compared with Brassica napus, solarization and untreated control. Data was collected on growth and yield parameters, nematode infestation and quality of tuberose. Data collected was subjected to analysis of variance at p≤0.05 and means separated using Tukey’s test. Biofumigation with Cleome gynandra accessions helped to reduce nematode population by 34%, gall numbers by 83% and galling index by be 96% when compared with the control. Use of biofumigation helped to improve plant height and leaf number of tuberose by 16% and 87%, respectively, when compared with the control. Use of biofumigation helped to improve spike length by 32%, marketable spikes by 80%, and flower yield by 90% and reduced nonmarketable spikes by 95% when compared with the control. Based on the above results, use of Cleome gynandra accessions and other biofumigants such as rape seed can be used to manage nematodes and improve growth, yield and quality of tuberose.

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