scholarly journals PENGARUH PUPUK HAYATI DENGAN KOMPOSISI MIKROORGANISME YANG BERBEDA TERHADAP PERTUMBUHAN TANAMAN

Biocelebes ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 148-156
Author(s):  
Amalia Puji` Cahyani ◽  
Asri Pirade Paserang ◽  
Meryany Ananda ◽  
Wahyu Harso
Keyword(s):  
Soil Pollution ◽  
Soil Quality ◽  
Paenibacillus Polymyxa ◽  
Dry Weight ◽  
Chemical Fertilizer ◽  
Maize Plant ◽  
Trichoderma Sp ◽  
Maize Plants ◽  
Plant Level ◽  
Rhizobium Sp

Biofertilizer can be used to replace chemical fertilizer so that soil quality is maintained and soil pollution can be avoided. The study aimed to determine the effect of biofertilizers with different compositions of microorganisms on the growth of maize plants. The research was carried out in a greenhouse. Maize plants were fertilized by two kinds of biofertilizers with different compositions of microorganisms. The first biofertilizer contained  Azotobacter sp,  Azospirillum sp,  Rhizobium sp,  Trichoderma sp,  and Lactobacillus sp, and the second biofertilizer contained Strenotrophomonas sp. and  Paenibacillus polymyxa. As controls, maize plants were fertilized by sterilized those biofertilizers. The results showed that the second biofertilizer increased the dry weight of the maize plant. Meanwhile, the first biofertilizer did not increase it. Several things must be considered in the application of biofertilizers, such as the composition of microorganisms, type of plant, level of fertilization, and the method of applying fertilizer to the plant.

scholarly journals PENINGKATAN PERTUMBUHAN TANAMAN JAGUNG ( Zea mays L.) MENGGUNAKAN JAMUR MIKORIZA ARBUSKULAR DARI JENIS YANG BERBEDA PADA KONDISI CEKAMAN AIR

Biocelebes ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 1-9
Author(s):  
Wahyu Harso ◽  
Isna Isna ◽  
Yusran Yusran
Keyword(s):  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Field Capacity ◽  
Dry Weight ◽  
Maize Plant ◽  
Shoot Dry Weight ◽  
Infected Root ◽  
Promote Plant Growth ◽  
Maize Plants

Arbsucular mycorrhizal fungi promote plant growth by enhancing mineral uptake. Contribution degree of arbuscular mycorrhizal fungi to promote plant growth depend on species of plant-fungus association. The aim of this study was to compare the ability of three species of Glomus to promote maize plant growth. Maize plants were inoculated with 20 g inoculum of either Glomus deserticola, Glomus etunicatum, or Glomus clorum.  Inoculum was soil containing spore, hyphae and infected root. Maize plants without addition inoculum were also used as a control. Water availability in the soil as growing medium was maintained on 40% field capacity. The results showed that addition of inoculum from three species of Glomus increased average of maize plant shoot dry weight  although there was no statisticaly significant differences.  Maize plant inoculated with G. clorum had higher shoot dry weight than maize plant inoculated either with G. etunicatum or G. deserticola while root colonization by G. clorum was lowest.

scholarly journals Improvement of Soil Chemical Properties and Growth of Maize due to Biochar Application on Ultisol

2019 ◽  
Vol 24 (3) ◽  
pp. 101
Author(s):  
Rianida Taisa ◽  
Desi Maulida ◽  
Abdul Kadir Salam ◽  
Muhammad Kamal ◽  
Ainin Niswati
Keyword(s):  
Soil Quality ◽  
Oil Palm ◽  
Chemical Properties ◽  
Dry Weight ◽  
Soil Chemical Properties ◽  
Maize Plant ◽  
Organic C ◽  
Palm Shell ◽  
Oil Palm Shell ◽  
Cocoa Shell

Ultisols have poor soil characteristics, yet biochar is one of the technologies that can be applied as a soil enhancer to improve the soil quality. Biochar has succeeded in improving soil quality, through improving soil physical, chemical, and biological properties. This research aimed to improve the quality of soil chemical properties and growth of maize plant, as well as to find a combination between biochar type and dosage of biochar that is able to improve the chemical properties of Ultisols and/or the growth of maize plant. This research was conducted at the Greenhouse and Soil Science Laboratory, Faculty of Agriculture, University of Lampung. This study used a randomized block design (RBD) arranged in factorial with 3 factors and 3 replications. The first factor was the soil layer (topsoil and subsoil), the second factor was the type of biochar (biochar of cocoa shell and biochar of oil palm shell), and the third factor was the biochar dosage (0, 10%, 20%, and 30% of 10 kg of oven dry weight soil). The results showed that (1) the application of biochar from the  cocoa shell and oil palm shell on Ultisols improved some parts of soil chemical properties, namely CEC, organic C, and Kexc, (2) application of biochar from the cocoa shell and oil palm shell on Ultisols increased the plant height, the number of leaves, and the dry weight of maize, (3) application of biochar from the cocoa shell at a dosage of 20% was significantly improved CEC of Ultisols (4) application of biochar from the cocoa shell in top soil at a dosage of 30% significantly improved the soil organic C of Ultisol, (5) application of  biochar from cacao shell at a dosage of  30%  was significantly improved Kexc, (6) application of biochar from oil palm shell at a dosage of 10% significantly increased maize plant growth.

IMPACT OF FERTILIZERS APPLICATION ON SEED GERMINATION AND SEEDLING GROWTH OF VIGNA RADIATA

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
SUPRIYA DIXIT ◽  
R. K. GUPTA
Keyword(s):  
Seed Germination ◽  
Leaf Area ◽  
Seedling Growth ◽  
Vigna Radiata ◽  
Agricultural Research ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Research Field ◽  
Chemical Fertilizer ◽  
Seedling Length

Currently, a real challenge for the workers in the agricultural research field is to stop or reduce the use of expensive agrochemicals/ chemical fertilizers which are hazardous to the environment as well as human health. Present study was aimed to improve the growth and obtain optimum yield of Vigna crop with eco-friendly, non-toxic way and to reduce the use of agrochemical/chemical fertilizer application in agricultural activities. A pot experiment was conducted to study the effect of chemical fertilizer (DAP) and biofertilizer ( Rhizobium strain) separately and in combination on seed germination and seedling growth (at 30 days) based on morphological parameters such as seedling length (cm), fresh weight (g), dry weight (g) and leaf area (cm)2 of Vigna radiata (L.) Wilczek. After one month (30 Days) observations, it was found that seedling length, fresh and dry weights and leaf area were maximum in T4 and minimum in T15, T7 and T8 favored improved seedling length and leaf area whereas T7, T8, and T9 favored improved fresh and dry weights as compared to control.

scholarly journals Pengaruh aplikasi pelapisan benih terhadap viabilitas benih terdeteriorasi serta pertumbuhan tanaman kedelai

Kultivasi ◽  
2016 ◽  
Vol 15 (2) ◽  
Author(s):  
Sumadi Sumadi ◽  
P. Suryatmana ◽  
Denny Sobardini
Keyword(s):  
Trichoderma Sp ◽  
Rhizobium Sp

Kualitas benih akan mempengaruhi dinamika pertumbuhan tanaman.  Tujuan penelitian ini adalah untuk mengkaji respons benih terdeteriorasi terhadap aplikasi berbagai pelapis benih, baik berupa insektisida maupun pelapis hayati berupa suspensi mikroorganisma yang dicerminkan dengan peningkatan laju tumbuh tanaman.  Penelitian merupakan percobaan petak terbagi dua faktor, yaitu tingkat deteriorasi (D) yang terdiri dari benih berkualitas baik (DB = 84 %) dan  benih terdeteriorasi (DB = 75 %) .  Pelapis benih yang digunakan terdiri dari Thiametoxam,  Rhizobium sp , Azotobakter sp , campuran Azotobakter sp + Rhizobium sp, dan  Trichoderma sp.  Hasil Percobaan menunjukkan bahwa tidak ada pengaruh interaksi antara tingkat deteriorasi benih dengan jenis pelapis benih terhadap semua parameter yang diamati. Kualitas benih memberi respons pertumbuhan yang berbeda terhadap jenis pelapis benih yang diberikan.  Aplikasi pelapis benih berupa insektisida maupun inokulan mikroorganisme tidak mampu meningkatkan vigor benih yang sudah terdeteriorasi, tetapi berpengaruh terhadap jumlah nodula efektif, perkembangan klorofil, Laju Tumbuh Relatif, Laju Asimilasi Bersih , dan Nisbah Pupus Akar. Secara umum pemberian Rhizobium sp dan Azotobacter sp dapat meningkatkan jumlah nodula efektif, tetapi tidak secara nyata mempengaruhi pertumbuhan tanaman. Kata Kunci : pelapis benih, thiametoxam, Azotobakter sp, Rhizobium sp, Trichoderma sp, viabilitas , vigor benih

scholarly journals Rhizobacteria inoculation in maize associated with nitrogen and zinc fertilization at sowing

2021 ◽  
Vol 25 (2) ◽  
pp. 96-100
Author(s):  
Andréia de L. Moreno ◽  
Jorge F. Kusdra ◽  
Angelita A. C. Picazevicz
Keyword(s):  
Bacillus Subtilis ◽  
Nitrogen Content ◽  
Plant Height ◽  
Nitrogen Fertilization ◽  
Azospirillum Brasilense ◽  
Dry Weight ◽  
Stem Diameter ◽  
Wide Range ◽  
Maize Plants ◽  
Total Dry Weight

ABSTRACT Rhizobacteria have a wide range of plant growth-promoting mechanisms of action, making them an alternative and/or complementary biological input for chemical fertilizers. In this respect, the present study aimed to assess growth and nitrogen accumulation in maize plants as a function of Azospirillum brasilense, Bacillus subtilis, zinc and nitrogen application at sowing. The experiment with the ‘AL Bandeirante’ maize variety was conducted in a greenhouse, using a completely randomized design. The treatments were arranged in a 2 x 2 x 2 x 2 factorial scheme, with six repetitions, considering the presence and absence of Azospirillum brasilense (5 g kg-1), Bacillus subtilis (5 mL kg-1) and zinc (20 g kg-1) in the seeds and addition or not of nitrogen (30 kg ha-1) to the soil. The variables assessed were plant height, stem diameter, leaf, stem, shoot, root and total dry weight, and shoot nitrogen content. Nitrogen fertilization in the absence of zinc increased shoot and total dry weight as well as shoot nitrogen content. Zinc applied to the seeds improved the total and stem dry weight of maize plants in the absence of Bacillus subtilis. Inoculation with Azospirillum brasilense and Bacillus subtilis increased the stem diameter and shoot nitrogen content of maize plants when nitrogen fertilization was not performed at sowing. There was no isolated or interaction effect between factors for plant height and root dry weight.

scholarly journals HUMIC SUBSTANCES AND PHOSPHOROUS SOURCES IN MAIZE CROPS

Nativa ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 371
Author(s):  
Lucas Morais Lôbo ◽  
Eva De Melo Ferreira ◽  
Camilla Oliveira Muniz ◽  
Carlos Alberto Da Silva Ferreira ◽  
Eliana Paula Fernandes Brasil
Keyword(s):  
Humic Substances ◽  
Dry Matter ◽  
Dry Weight ◽  
Agronomic Efficiency ◽  
Shoot Dry Weight ◽  
P Accumulation ◽  
Phosphorus Sources ◽  
Maize Plants ◽  
Best Responses ◽  
P Sources

SUBSTÂNCIAS HÚMICAS E FONTES DE FÓSFORO NA CULTURA DO MILHO O objetivo do estudo é verificar o efeito da adição de doses de um produto comercial a base de substâncias húmicas (SH), na produção de massa seca de plantas de milho, no acúmulo de P nas plantas e a eficiência agronômica de fontes de fósforo em dois tipos de solos com diferentes capacidades de adsorção. O trabalho foi conduzido em casa de vegetação. Os tratamentos compreendem quatro doses de substâncias húmicas (0, 100, 200 e 400 kg ha-1) e duas fontes de fósforo (superfosfato triplo – SFT e fosfato natural reativo – FNR), em dois tipos de solos (Latossolo Vermelho – LV e Neossolo Quartzarênico – NQ). As fontes de P foram fornecidas em dose constante de 75 mg.dm-3 de P. Houve resposta estatisticamente significativa (P<0,05) da produção de massa seca da parte aérea (MSPA), massa seca das raízes (MSR), P acumulado na parte aérea e P acumulado nas raízes à adição de SH. No LV os parâmetros MSPA, MSR, P acumulado na parte aérea, P acumulado nas raízes e a Eficiência agronômica relativa das fontes de P aumentaram com a adição crescente de SH, obtendo os melhores resultados com uso da maior dose (400 kg ha-1). No NQ as melhores respostas foram obtidas com a adição de 100 kg ha-1 da SH. Estes resultados indicam que a utilização de substâncias húmicas é eficiente para o aumento da produção de massa seca das plantas de milho e no teor de P acumulado.Palavras-chave: P acumulado, eficiência agronômica relativa, adsorção de fósforo. ABSTRACT: The objective of this study was to verify the effect of the application of different rates of a commercial product based on humic substances (HS) on the dry matter contents, and P accumulation in maize plants and the agronomic efficiency of phosphorus sources in two soils with different adsorption capacities. The experiment was conducted in a greenhouse. The treatments consisted of four rates of humic substances (0, 100, 200, and 400 kg ha-1) and two phosphorus sources (triple superphosphate – TSP; and reactive natural phosphate – RNP) in two types of soils (Rhodic Hapludox – RH; and Typic Quartzipsamment – TQ). The response of the shoot dry weight (SDW), root dry weight (RDW), shoot accumulated P, and root accumulated P to the application of HS was statistically significant (P <0.05). In the RH, the SDW, RDW, shoot and root accumulated P, and relative agronomic efficiency of the P sources increased with increasing HS rates; thus, the best results were found with the use of the highest rate (400 kg ha-1). In the TQ, the best responses were found with the application of 100 kg ha-1 of HS. These results indicate that the use of humic substances is efficient to increase dry matter and accumulated P contents in maize plants.Keywords: accumulated P, relative agronomic efficiency, P adsorption.

THE RELATIONSHIP BETWEEN FINAL YIELD AND PHOTOSYNTHESIS AT FLOWERING IN INDIVIDUAL MAIZE PLANTS

1979 ◽  
Vol 59 (3) ◽  
pp. 585-601 ◽  
Author(s):  
G. O. EDMEADES ◽  
T. B. DAYNARD
Keyword(s):  
Grain Yield ◽  
Shoot Growth ◽  
Plant Density ◽  
Meteorological Data ◽  
Dry Weight ◽  
Plant Variation ◽  
Final Yield ◽  
Black Layer ◽  
Maize Plants ◽  
The Relationship

In an attempt to explain plant-to-plant variation in dry weight of maize (Zea mays L.), a computer program was developed to predict daily assimilation per plant and its distribution throughout the shoot at flowering. Inputs to the model were meteorological data, photosynthetic rate-irradiance curves, measurements of intraplant assimilate distribution at flowering, and the positions of individual leaves of plants grown in the field at three densities (50 000, 100 000 and 150 000 plants/ha). Dry weights were recorded on these same plants following black layer formation. Predicted effects of plant density on shoot growth compared favorably with available data. The correlation coefficient between predicted assimilation 1 day after anthesis and grain yield on the same plants, with treatment effects removed, was 0.67 (N = 360). The coefficient of variation of predicted assimilate flux per plant increased significantly with increasing density, and the fluxes were generally normally distributed. Results supported the concept of a threshold assimilation rate per plant below which grain would not normally form, and this appears to be the cause of the bimodal frequency distribution of grain yield per plant observed at high densities.

scholarly journals Use of Soil Enzymes as Indicators for Contaminated Soil Monitoring and Sustainable Management

2020 ◽  
Vol 12 (19) ◽  
pp. 8209
Author(s):  
Sang-Hwan Lee ◽  
Min-Suk Kim ◽  
Jeong-Gyu Kim ◽  
Soon-Oh Kim
Keyword(s):  
Soil Pollution ◽  
Soil Quality ◽  
Soil Remediation ◽  
Functional Recovery ◽  
Contaminated Soil ◽  
Soil Enzymes ◽  
Chemical Properties ◽  
Recovery Process ◽  
Recovery Processes ◽  
Physico Chemical

Diagnosis of the risk of soil pollution and the performance of measures for the recovery of contaminated soil requires proper monitoring of the extent of soil function damage and its recovery process. Soil enzymes reveal ecosystem perturbations, are sensitive to management choices, and have been used as indicators of biogeochemical cycles, organic matter degradation, and soil remediation processes. Thus, enzymes can indicate, along with other physical or chemical properties, soil quality. In this paper, we review the effects of soil pollutants [toxic trace elements (TTE), and petroleum hydrocarbons (PHC)] on enzymatic activities and evaluate the usefulness of soil enzyme’s activity for monitoring recovery processes in contaminated soil. Soil enzymes can be said to be a powerful means of monitoring to properly indicate the degree of deterioration of soil quality caused by soil pollution and to diagnose the process of functional recovery of contaminated soil. Further research is needed to establish the quantitative relationships between the soil physico-chemical properties and enzyme activity and the effect of soil remediation on the functional recovery of soil-related to soil quality.

Experience and Problems in Planting Winter Wheat in Reclaimed Wasteland in An Oasis Area in Xinjiang, China

2020 ◽  
Author(s):  
Tianyu Wang ◽  
Zhenhua Wang ◽  
Jinzhu Zhang
Keyword(s):  
Soil Pollution ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Soil Salinization ◽  
Chemical Fertilizer ◽  
Water Soluble ◽  
Drip Irrigation System ◽  
Plastic Film ◽  
Reclaimed Land ◽  
Advantages And Disadvantages

&lt;p&gt;Xinjiang is located in the northwest of China and in the hinterland of Eurasia. The area is dominated by basins and deserts, with less rainfall and large evaporation. Therefore, most of the agricultural cultivation in this area is developed in piedmont oases.&amp;#160;&lt;br&gt;&amp;#160;Shihezi City is located in the middle of Xinjiang and has a typical continental climate. We have carried out long-term follow-up observation on two cultivated lands near Shihezi. Plots 147 # and 148 # were originally used for planting cotton, but due to the shortage of irrigation and the serious problem of soil salinization, cotton plants in these two plots were eventually abandoned. In 2008, local farmers began to use drip irrigation system to replant wheat on fallow land 147 # and 148 #. The outcome shows some achievements have been made. In 2008, the amount of irrigation on 147 # and 148 # was 360mm-405mm, and the yield was 7676kg/hm&lt;sup&gt;2&lt;/sup&gt;-8879kg/hm&lt;sup&gt;2&lt;/sup&gt;.&amp;#160;&lt;br&gt;&amp;#160;We believe that there are three main reasons for successful farming on reclaimed land:&amp;#160;&lt;br&gt;(1) The reclaimed land was leveled to reduce the difference in land height and improve the uniformity of irrigation.&amp;#160;&lt;br&gt;(2) Compared with previous flooding irrigation, the drip irrigation system can better save water and reduces soil salinization;&amp;#160;&lt;br&gt;(3) The application of water-soluble chemical fertilizer has changed the traditional fertilization method in the past and improved the efficiency of using fertilizer.&amp;#160;&lt;br&gt;After ten years of reclamation and cultivation, what has attracted our attention is that there are also problems in plots 147 # and 148 #:&amp;#160;&lt;br&gt;(1) White pollution: In order to reduce soil evaporation brought by local heat, farmers generally use plastic mulching to cover the soil. According to the field observation and our related research, the problem of plastic film residue in the soil is very serious. At present, the density of plastic film residue increases around 16.37 kg/hm&lt;sup&gt;2&lt;/sup&gt; per year.&amp;#160;&lt;br&gt;(2) Excessive application of chemical fertilizer causes potential soil pollution: Compared with traditional flood irrigation, the amount of fertilizer applied after the drip irrigation system is reduced, but the amount of chemical fertilizer used is still very large, which causes potential soil pollution.&amp;#160;&lt;br&gt;(3) The problem of soil salinization always exists: the drip irrigation system can effectively reduce the salt on the surface of the soil during the growth cycle of crops, but the salt deep in the soil always accumulates and cannot be effectively excreted.&amp;#160;&lt;br&gt;In view of the above problems, the more effective solutions at present are:&amp;#160;&lt;br&gt;(1) Degradable plastic film: The new plastic film can degrade itself and reduce accumulation in soil.&amp;#160;&lt;br&gt;(2) New plastic film recycling machine: improve the recovery rate of plastic film.&amp;#160;&lt;br&gt;(3) Optimizing irrigation and fertilization scheme: Through field experiments, find out the most reasonable irrigation and fertilization scheme.&amp;#160;&lt;br&gt;(3) Salinization control: Different methods such as using an underground pipe to discharge salt and applying soil conditioners are adopted to control the salinization of land, but different saline-alkali land control measures have their own advantages and disadvantages, therefore, further analysis is needed in practice.&amp;#160;&lt;/p&gt;

scholarly journals Pemanfaatan tandan kosong kelapa sawit sisa jamur merang (Volvariella volvacea)(TKSJ) sebagai pupuk organik pada pembibitan kelapa sawit Utilization of spent mushroom (Volvariella volvacea) media derived from empty fruit bunches of oil palm (SMEB) as organic fertilizer on oil palm seedling

2016 ◽  
Vol 75 (2) ◽  
Author(s):  
Happy WIDIASTUTI ◽  
. TRI-PANJI
Keyword(s):  
Organic Carbon ◽  
Oil Palm ◽  
Growth Parameters ◽  
Organic Fertilizer ◽  
Dry Weight ◽  
Chemical Fertilizer ◽  
Volvariella Volvacea ◽  
Fresh Weight ◽  
Empty Fruit Bunches ◽  
Leaf Dry Weight

SummaryThe utilization of lignocellulolitic emptyfruit-bunches of oil-palm (EFBOP) material asstraw mushroom (Volvariella volvacea) mediacould produce short chain organic carbon andnutrients which may be available for growth ofplant. This research was aimed to determine theeffect of spent mushroom media amendmentderived from empty fruit bunches of oil palm(SMEB) as organic fertilizer on the growth andnutrient uptake of oil palm seedling. Theexperiment was conducted at greenhouse usingacid soil. Oil palm seedling was grown in 60 x 50cm polybags. The experiment was carried out toexamine 20 treatments i.e. combinations of fourlevel of SMEB (0, 25%, 50%, and 75% w/w) andfive dosages of conventional fertilizer (0, 25%,50%, 75%, and 100%) recommended dosages.The experiment was conducted using completerandomized design with factorial type. Theresearch showed that the amendment of SMEB atthe level of 25% could increase the height ofseedling, fresh weight of root, stem, and seedlingsas well as dry weight of oil palm stem. However,for leaf dry weight, a higher addition of SMEB upto 50% was needed. Fertilizing at 25% ofrecommended dosage could increase the seedlingheight, fresh weight of stem and leaf while forseedling fresh weight and leaf number, higheraddition of fertilizer up to 50% was needed.Significantly higher uptake of K and Mg wasobserved on the amendment of 75% of SMEB.The higher addition of SMEB (up to 75% w/w)did not decrease any growth parameters andnutrient uptake. However, the addition of 100%of recommended chemical fertilizer tended todecrease various growth parameters and uptakeof N, P, K, and Mg of oil palm seedling.RingkasanPenggunaan bahan lignoselulosa sebagaimedium jamur merang (Volvariella volvacea)diketahui dapat menghasilkan senyawa karbonrantai pendek demikian pula hara tersedia,sehingga diduga bahan ini dapat digunakansebagai pupuk organik untuk tanaman. Penelitiandilakukan untuk mengetahui pengaruh pemberiantandan kosong kelapa sawit (TKKS) sisa mediumjamur merang (TKSJ) terhadap pertumbuhan danserapan hara bibit kelapa sawit. Percobaandilakukan di rumah kaca menggunakan tanahbereaksi masam. TKKS sisa medium jamurmerang (TKSJ) sesuai dosis perlakuan dicampurdengan tanah dan selanjutnya bibit kelapa sawitditanam di polibag berukuran 60 x 50 cm.Percobaan dilakukan untuk menguji 20 perlakuanyang merupakan kombinasi empat tingkat TKSJ(0, 25%, 50% dan 75% b/b) dan lima dosis pupukkonvensional (0, 25%, 50%, 75% dan 100%)dosis rekomendasi. Percobaan dilakukan meng-gunakan rancangan acak lengkap dengan polafaktorial. Hasil percobaan menunjukkan bahwapemberian TKSJ pada tingkat 25% dapatmeningkatkan tinggi bibit, bobot basah akar,batang, dan bibit serta bobot kering batangkelapa sawit. Namun, untuk peubah bobot keringdaun diperlukan pemberian TKSJ yang lebihtinggi yaitu 50%. Pemupukan pada dosis 25%rekomendasi meningkatkan tinggi, bobot basahbatang dan daun sedangkan untuk jumlah daundan bobot basah bibit diperlukan dosis pupuk50%. Serapan hara K dan Mg nyata lebih tinggipada pemberian 75% TKSJ. Pemberian TKSJpada jumlah yang tinggi (hingga 75% b/b) tidakmenyebabkan penurunan berbagai peubah per-tumbuhan dan serapan hara, namun pemberianpupuk 100% rekomendasi cenderung menurun-kan berbagai peubah pertumbuhan dan serapanhara N, P, K, dan Mg bibit kelapa sawit.

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