scholarly journals Response of soil sulfur availability to elevation and degradation in the Wugong Mountain meadow, China

2017 ◽  
Vol 63 (No. 6) ◽  
pp. 250-256 ◽  
Author(s):  
Li Zhi ◽  
Zhang Ling ◽  
Chen Jing ◽  
Zhang Xueling ◽  
Yu Suqin ◽  
...  
Keyword(s):  
Nutrient Management ◽  
Soil Nutrient ◽  
Principal Component ◽  
Elevation Gradients ◽  
Nutrients Cycling ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nutrient Changes ◽  
Soil Sulfur ◽  
Nitrogen Phosphorus

Vegetation restorations of degraded meadows have been widely implemented. The evaluation of soil nutrient changes as affected by degradation is vital for efficient restorations. However, while macronutrients (nitrogen, phosphorus and potassium) have been widely investigated, sulfur (S) as one important element correlated tightly with other nutrients has not been thoroughly studied. Two studies were conducted to determine changes of sulfur as affected by degradation and elevation gradients. The results showed that available S (AS) changed non-linearly with elevation and the first principal component based on other soil nutrient variables. Soil AS depended on degradation levels and contributed substantially to the separation of meadows with different degradation levels. Moreover, AS responded stronger to changes in elevation gradients and degradation levels compared with other major nutrients. Thereby, AS could be an important nutrient responding to meadow disturbance, which should be considered in future studies on meadow soil nutrients cycling and vegetation restorations. The findings have implications for ecological restoration of degraded meadows with respect to soil nutrient management and conservations.

scholarly journals An Assessment of the Site-Specific Nutrient Management (SSNM) Strategy for Irrigated Rice in Asia

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 559
Author(s):  
Divina Gracia P. Rodriguez
Keyword(s):  
Nutrient Management ◽  
Empirical Studies ◽  
The Philippines ◽  
Irrigated Rice ◽  
Site Specific ◽  
Fertilizer Recommendation ◽  
Fertilizer Recommendations ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nitrogen Phosphorus

The site-specific nutrient management (SSNM) strategy provides guidelines for effective nitrogen, phosphorus and potassium management to help farmers make better decisions on fertilizer input and output levels in rice (Oryza sativa) production. The SSNM fertilizer recommendations are based on the yield goal approach, which has been frequently cited in empirical studies. This study evaluates the assumptions underlying the SSNM strategy for rice in the top rice-producing countries around the world, including India, Indonesia, the Philippines, Thailand, and Vietnam. Using a generalized quadratic production function, I explore whether major nutrients are substitutes as inputs and if there are complementarities between inorganic fertilizer and soil organic matter (SOM). The results suggest the relationships among major nutrients vary across sites—some inputs are complements, some are substitutes, and some are independent. The SOM also significantly affects the nitrogen fertilizer uptake. I conclude by suggesting that the SSNM strategy can be made to be more adaptive to farmer’s fields if these relationships are accounted for in the fertilizer recommendation algorithm.

scholarly journals Germplasm Screening of Green Manure Rapeseed through the Effects of Short-Term Decomposition on Soil Nutrients and Microorganisms

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1219
Author(s):  
Xiaodan Wang ◽  
Hua Ma ◽  
Chunyun Guan ◽  
Mei Guan
Keyword(s):  
Soil Nutrients ◽  
Green Manure ◽  
Soil Microorganisms ◽  
Soil Nutrient ◽  
Principal Component ◽  
Nutrient Content ◽  
Germplasm Screening ◽  
Significant Difference ◽  
Soil Nutrient Content ◽  
Phosphorus And Potassium

The rapidly emerging fertilizer rapeseed used as green manure has wide applications for use. However, there have been few studies on its decomposition and effects on soil nutrients and microorganisms after its decay. In this study, 12 rapeseed lines to be screened were decomposed through a randomized block field design with two green-manure-specific varieties as the controls. The contents of nitrogen, phosphorus, and potassium from the plants, soil nutrients, and microbial changes after degradation were measured. There were substantial differences in the rates of decomposition and cumulative release of nutrients among the different lines after 30 days of rolling. The contents of phosphorus and potassium in the soil were 1.23–2.03 and 3.93–6.32 times those before decomposition, respectively. In addition, there was a significant difference in the relative content of soil microorganisms at the phylum level after the decomposition of different species of rapeseeds. Most of the top 20 bacterial groups significantly correlated with the characteristics of plant decomposition and soil nutrient content, including Proteobacteria, Actinomycetes, Armatimonadetes, Rokubacteria, and Planctomycetes. A principal component analysis showed that the soil microorganisms and nutrients are the leading factors that enable the evaluation of the decomposing characteristics of green manure rapeseed. Numbers 5 (purple leaf mustard) and 8 (Xiafang self-seeding) were more effective than two controls, which can be used as excellent types of germplasm to promote the breeding of green manure rapeseed.

scholarly journals Integrated Nutrient Management on Soil Properties and Nutrient Uptake by Red Onion

2017 ◽  
Vol 5 (5) ◽  
pp. 471
Author(s):  
Emmanuel Kwada Kwaghe ◽  
Abdullahi Muhammad Saddiq ◽  
Rejoice Ibrahim Solomon ◽  
Salihu Ardo Musa
Keyword(s):  
Soil Properties ◽  
Total Nitrogen ◽  
Nutrient Management ◽  
P Uptake ◽  
Integrated Nutrient Management ◽  
Nutrient Inputs ◽  
Fertility Status ◽  
Phosphorus And Potassium ◽  
The Impact ◽  
Nitrogen Phosphorus

Field experiments were carried out during the dry seasons in (2012-2013 and 2013-2014) to study the impact of Integrated Nutrient Management on some soil properties and nutrients uptake by red onion (Allium cepa L.) in Moda, Michika, Adamawa state, Nigeria. Soil samples were randomly collected and analysed for pH, EC, organic carbon, organic matter, total nitrogen, available phosphorus before and at the completion of the experiment. Total nitrogen, phosphorus and potassium contents of the onion bulbs were determined. There was an improvement in the fertility status of the soil as a consequence of integrated nutrient management. Combined organic and inorganic fertilizer application influenced the uptake of nitrogen, phosphorus and potassium by red onion. The highest nitrogen, phosphorous and potassium uptake by onions of 0.76, 43.82 and 2.42kgha-1 occurred when all treatments were combined. Uptake of N and K increased as treatment level increased. The P uptake was highest at lower treatment levels and could be linked to sufficiency of indigenous soil P for plant growth resulting in high P uptake with minimal addition of nutrient inputs. Integrated Nutrient Management could be adopted to improve soil fertility status and N, P and K uptake by red onions.

scholarly journals Yield and nutrient uptake in niger (Guizotia abyssinica) as influenced by different levels of nitrogen, phosphorus, potassium and sulphur

2021 ◽  
Vol 17 (2) ◽  
pp. 502-508
Author(s):  
P. Bora ◽  
P. C. Bora ◽  
K. Kurmi ◽  
S. Kalita
Keyword(s):  
Seed Yield ◽  
Block Design ◽  
Phosphorus Uptake ◽  
First Year ◽  
Randomized Block Design ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nitrogen Phosphorus ◽  
Different Levels ◽  
Sulphur Uptake

A field experiment was conducted during the Rabi seasons of 2016-17 and 2017-18 at Instructional-Cum-Research (ICR) Farm, Assam Agricultural University, Jorhat to study the effect of different levels of primary major nutrients (nitrogen, phosphorus and potassium) as well as secondary nutrient (sulphur) on the uptake of the same by niger and yield of the crop. The experiment was laid out in Factorial Randomized Block Design and replicated thrice. The treatments consisted of three NPK levels viz., F1 (20-10-10 kg N-P2O5-K2O ha-1), F2 (25-12.5-12.5 kg N-P2O5-K2O ha-1), F3 (30-15-15 kg N-P2O5-K2O ha-1) and three sulphur levels viz., S1 (no sulphur), S2 (10 kg S ha-1), S3 (20 kg S ha-1). Application of F3 (30-15-15 kg N-P2O5-K2O ha-1) and S3 (20 kg sulphur ha-1) significantly increased the nitrogen, phosphorus, potassium and sulphur uptake by seed and stover as well as their total uptake by niger as compared to other treatments during both the years of study. Seed yield and protein content (%) of seed of niger were also increased significantly by application of F3 (30-15-15 kg N-P2O5-K2O ha-1) and S3 (20 kg sulphur ha-1) as compared to other treatments during both the years. Interaction effects of NPK (F) and sulphur (S) were found to be significant in respect of seed yield, nitrogen, phosphorus, potassium and sulphur uptake by seed as well as total nitrogen uptake by niger during both the years and phosphorus uptake by niger was found to be significant only in the first year of study.

scholarly journals An Effect of Nutrient Deficiency on Yield Estimation

2019 ◽  
Vol 8 (3) ◽  
pp. 7-18
Keyword(s):  
Agricultural Sector ◽  
Nitrogen Deficiency ◽  
Total Yield ◽  
Nutrient Deficiency ◽  
Ground Truth ◽  
Proposed Model ◽  
Segmentation Methods ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nitrogen Phosphorus

By taking corrective measures to improve the farming quality, agricultural sector need a thoroughly explained and systematic theory for crop yield prediction. Any yield of the crop is usually depending on the crop unhealthy and healthy conditions. These conditions mainly occur due to major nutrients like nitrogen, Phosphorus and Potassium (NPK). Nitrogen deficiency will make the fields in some parts look Yellowish. Potassium deficiency may lead to have spots in the leaf and Phosphorous will make the fields some part look brownish. Hence segmenting this defected area is the major challenge to evaluate the total yield in the input paddy field image. The proposed model focus on segmentation of these regions using an efficient hierarchical model. This model uses segmentation methods like FCM and Color segmentation techniques there by improving the accuracy of the system and comparing with the ground truth values

scholarly journals Effect of organic and inorganic nutrient management on nutrient uptake by rice (Oryza sativa L.)

2021 ◽  
Vol 17 (AAEBSSD) ◽  
pp. 257-261
Author(s):  
Vishnu ◽  
Vishal Verma ◽  
Gabu Singh Gathiye
Keyword(s):  
Oryza Sativa ◽  
Nutrient Uptake ◽  
Nutrient Management ◽  
Oryza Sativa L ◽  
Inorganic Nutrient ◽  
Straw Yield ◽  
Phosphorus And Potassium ◽  
Jawaharlal Nehru ◽  
Absolute Control ◽  
Nitrogen Phosphorus

The field experiment was carried out at AICRP IFS Research Farm, Krishi Nagar, Jawaharlal Nehru Krishi Vishwa Vidyalaya, and Jabalpur (MP), India during Kharif season of 2016. The study was carried out to evaluate the suitable organic and inorganic nutrient for rice crop. The results revealed that grain yield, straw yield and nutrient uptake viz., nitrogen, phosphorus and potassium uptake by grain and straw of rice were higher with application of 100% NPK through fertilizers and 50% N through Vermicompost + 50% NPK through fertilizers, as compared to 100% N through Vermicompost, 75% N through Vermicompost, farmers practice N: 60, P: 30 through fertilizers + 3 tonnes FYM/ha, 75% N through Vermicompost + 25% NPK through fertilizers and absolute control.

scholarly journals Effect of Organic Fertilization Treatment, Frying Oil and Cultivar Variety on the Volatile Profile of Potato Tubers

2016 ◽  
Vol 4 (1) ◽  
pp. 01-08 ◽  
Author(s):  
A. Nikolaou ◽  
T Varzakas ◽  
Y Kourkoutas
Keyword(s):  
Carbonyl Compounds ◽  
Corn Oil ◽  
Principal Component ◽  
Frying Oil ◽  
Control Treatment ◽  
Potato Tubers ◽  
Organic Fertilization ◽  
Phosphorus And Potassium ◽  
High Fertilization ◽  
Nitrogen Phosphorus

The effect of organic fertilization and frying oil (olive, soybean and corn oil) on the volatiles’ profile of three potato cultivars (Voyager, Spunta and Lady Rosetta) was studied. During cultivation, nine treatments (T) involving the combination of nitrogen, phosphorus and potassium fertilization were applied: T1: control treatment; T2: N1, P1, K1; T3: N1, P1, K2; T4: N1, P2, K1; T5: N1, P2, K2; T6: N2, P1, K1; T7: N2, P1 K2; T8: N2, P2, K1; and T9: N2, P2, K2, where Ν1=1.3 g Ν per plant; N2=2.0 g Ν per plant; P1=3.1 g P2O5 per plant; P2=5.2 g P2O5 per plant; Κ1= 4.0 g K2O per plant; and Κ2= 6.6 g K2O per plant. The main volatile compounds identified by HS-SPME GC/MS analysis were esters, alcohols, carbonyl compounds and hydrocarbons. Principal Component Analysis revealed that nitrogen fertilization affected the volatiles’ profile only when high fertilization of P2O5 (5.2 g/plant) and K2O (6.6 g/plant) was applied.

scholarly journals Production and Economics of Hybrid Maize (Zea mays L.) under Integrated Nutrient Management Practices

2020 ◽  
Author(s):  
D. Kalyanasundaram ◽  
R. Augustine
Keyword(s):  
Management Practices ◽  
Nutrient Management ◽  
Block Design ◽  
Foliar Spray ◽  
Integrated Nutrient Management ◽  
Yield Attributes ◽  
Soil Application ◽  
Phosphorus And Potassium ◽  
Hybrid Maize ◽  
Nitrogen Phosphorus

Background: Integrated nutrient management is considered as one of the major tools in agricultural production worldwide. Occupying 3.5% of gross cropped area (GCA), maize accounts for 2.3% of total fertilizer consumption. Despite its soil status, little is known about the application and dosage of integrated nutrient in the experimental hybrid maize crop in the region. Any strategy against this nutrient deterioration must have a good knowledge of the composition and application of integrated nutrient source utilized. The field study aimed to study the integrated nutrient management in hybrid maize of this region to evaluate the performance in growth, yield and nutrient related problems.Methods: A Field experiment was conducted during rabi season of 2018, at experimental farm, Department of Agronomy, Annamalai University, Chidambaram, Tamilnadu. India. Thirteen treatments with three replications were laid out in randomized block design. The treatments combinations were T1: Recommended dose of fertilizer (RDF) 135:62.5:50 kg N:P2O5:K2O ha-1, T2: RDF + Beema green granules (25 kg ha-1) as soil application, T3: 75% RDF + Beema green granules (25 kg ha-1) as soil application, T4: RDF + Uphaar (250gm ha-1) as foliar spray twice, T5: RDF + Beema green granules (25 kg ha-1) soil application + Uphaar (250gm ha-1) foliar spray twice, T6: 75% RDF + Beema green granules (25 kg ha-1) soil application + Uphaar (250gm ha-1) foliar spray twice, T7: RDF + Tracel (3.75kgha-1) foliar spray twice, T8: RDF + Beema green granules (25 kg ha-1) soil application + Tracel (3.75kg ha-1) foliar spray twice, T9: 75% RDF + Beema green granules (25 kg ha-1) soil application + Tracel (3.75kg ha-1) foliar spray twice, T10: RDF + Uphaar (250gm ha-1) first and Tracel (3.75kg ha-1) second foliar spray. T11: RDF + Beema green granules (25 kg ha-1) soil application + Uphaar (250gm ha-1) first and Tracel (3.75kg ha-1) second foliar spray, T12: 75% RDF + Beema green granules (25 kg ha-1) soil application + Uphaar (250gm ha-1) first and Tracel (3.75kg ha-1) second foliar spray, T13: RDF + water spray twice. The collected samples were statistically analyzed for cob length, cob diameter, grain no. /cob, grain yield, stover yield, available Nitrogen, Phosphorus and Potassium and Post-harvest nutrient status of Nitrogen, Phosphorus and Potassium. Result: Our investigation in the maize hybrid crop has confirmed us with unique results. Among the treatments RDF + Beema green granules (25 kg ha-1) soil application + Uphaar (250gm ha-1) first and Tracel (3.75kg ha-1) second foliar spray (T11) was highly significant with increased yield and yield attributes and was best in gross and net returns too. The present work will be a contribution to the comprehensive study of the integrated nutrient management in hybrid maize.

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