scholarly journals The role of biochar on greenhouse gas offsets, improvement of soil attributes and nutrient use efficiency in tropical soils

2015 ◽  
Author(s):  
Thalita Fernanda Abbruzzini
Keyword(s):  
Greenhouse Gas ◽  
Nutrient Use Efficiency ◽  
Tropical Soils ◽  
Soil Attributes ◽  
Nutrient Use ◽  
Use Efficiency

The Role of Nanofertilizers in Smart Agriculture: An Effective Approach to Increase Nutrient Use Efficiency

2021 ◽  
pp. 493-510
Author(s):  
Devendra Jain ◽  
Suman Sanadhya ◽  
Heena Saheewala ◽  
Arunabh Joshi ◽  
Ali Asger Bhojiya ◽  
...  
Keyword(s):  
Nutrient Use Efficiency ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Smart Agriculture

scholarly journals Simulation of fertilizer requirement for irrigated wheat in Eastern India using the QUEFTS model

2006 ◽  
Vol 6 ◽  
pp. 231-245 ◽  
Author(s):  
Debtanu Maiti ◽  
D.K. Das ◽  
H. Pathak
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Nutrient Use Efficiency ◽  
Chemical Properties ◽  
Tropical Soils ◽  
Crop Modeling ◽  
Eastern India ◽  
Site Specific ◽  
Nutrient Use ◽  
Use Efficiency

Crop modeling can provide us with information about fertilizer dose to achieve the target yield, crop conditions, etc. Due to conventional and imbalanced fertilizer application, nutrient use efficiency in wheat is low. Estimation of fertilizer requirements based on quantitative approaches can assist in improving yields and nutrient use efficiency. Field experiments were conducted at 20 sites in eastern India (Nadia district of West Bengal) to assess the soil supply, requirement, and internal efficiency of N, P, K, and Zn in wheat. The data were used to calibrate the QUEFTS (Quantitative Evaluation of the Fertility of Tropical Soils) model for site-specific, balanced fertilizer recommendations. The parameters of maximum accumulation (a) and maximum dilution (d) in wheat were calculated for N (35, 100), P (129, 738), K (17, 56), and Zn (21502, 140244). Grain yield of wheat showed statistically significant correlation with N (R2= 0.937**), P (R2= 0.901**), and K uptake (R2= 0.801**). The NPK ratio to produce 1 tonne grain yield of wheat was calculated to be 4.9:1.0:8.9. The relationships between chemical properties and nutrient-supplying capacity of soils were also established. The model was validated using the data from four other experiments. Observed yields with different amounts of N, P, K, and Zn were in good agreement with the predicted values, suggesting that the validated QUEFTS model can be used for site-specific nutrient management of wheat.

Beneficial role of endophytes in biofortification of Zn in wheat genotypes varying in nutrient use efficiency grown in soils sufficient and deficient in Zn

2017 ◽  
Vol 416 (1-2) ◽  
pp. 107-116 ◽  
Author(s):  
Devendra Singh ◽  
Mahendra Vikram Singh Rajawat ◽  
Rajeev Kaushik ◽  
Radha Prasanna ◽  
Anil Kumar Saxena
Keyword(s):  
Nutrient Use Efficiency ◽  
Wheat Genotypes ◽  
Beneficial Role ◽  
Nutrient Use ◽  
Use Efficiency

scholarly journals Estimating Nutrient Uptake Requirements for Melon Based on the QUEFTS Model

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 207
Author(s):  
Meijuan Wen ◽  
Sicun Yang ◽  
Lin Huo ◽  
Ping He ◽  
Xinpeng Xu ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Use Efficiency ◽  
Tropical Soils ◽  
Fertilizer Application ◽  
Linear Increase ◽  
Nutrient Requirements ◽  
Potential Yield ◽  
Nutrient Use ◽  
Fertilizer Recommendations ◽  
Use Efficiency

Imbalanced and excessive fertilizer application has resulted in low yields and reduced nutrient use efficiency for melon production in China. Estimating nutrient requirements is crucial for effectively developing site-specific fertilizer recommendations for increasing yield and profit while reducing negative environmental impacts. Relationships between the yield and nutrient uptake requirements of above-ground dry matter were assessed using 1127 on-farm observations (2000–2020) from melon production regions of China. The quantitative evaluation of fertility of tropical soils (QUEFTS) model was used to estimate nutrient requirements. It predicted a linear increase in yield at balanced nutrient uptake levels until the yield reached approximately 60–80% of the potential yield. In order to produce 1000 kg of fruit, 2.9, 0.4 and 3.2 kg/ha of N, P and K (7.2:1.0:7.8), respectively, were required for above-ground parts, while the corresponding nutrient internal efficiencies were 345.3, 2612.6 and 310.0 kg per kg N, P and K, respectively, whereas 1.4, 0.2 and 1.9 kg of N, P and K were required to replace nutrients removed after harvest. The corresponding fruit absorption rates were 47.0%, 59.5% and 58.2%, respectively. Field validation experiments confirmed the consistency between observed and simulated uptake rates, indicating that this model could estimate nutrient requirements. These findings will help develop fertilizer recommendations for improving melon yield and nutrient use efficiency.

Rootstocks to improve root function and resource-use efficiency

2021 ◽  
pp. 561-588
Author(s):  
Francisco Pérez-Alfocea ◽  
◽  
Stephen Yeboah ◽  
Ian C. Dodd ◽  
◽  
...  
Keyword(s):  
Resource Use ◽  
Stomatal Closure ◽  
Nutrient Use Efficiency ◽  
Crop Improvement ◽  
Resource Use Efficiency ◽  
Form And Function ◽  
Nutrient Use ◽  
Use Efficiency ◽  
And Function

Grafting, a surgical technique to attach genetically different shoots and roots (scions and rootstocks) allows “designer root systems” to enhance agricultural productivity and sustainability. Rootstocks improve plant nutrient relations by increasing nutrient capture and/or nutrient use efficiency, by multiple mechanisms including altered root morphology. Moreover, rootstocks can enhance water uptake and/or diminish water loss according to changes in root form and function, and root-to-shoot phytohormonal signalling. While the role of root-to-shoot ABA signalling in effecting stomatal closure is equivocal, root-sourced cytokinins and ACC regulate shoot senescence and vegetative growth respectively. Rootstock-mediated crop improvement offers opportunities to enhance crop resource use efficiency, especially in the developing world.

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