Organic Amendments in Fruit-Based Agroforestry Systems: Impacts on Crop Productivity, Soil Properties and Climate Change Mitigation in the Vindhyan Region of India
摘要
Sustainable intensification of agriculture is essential to meet rising food demand while mitigating land degradation, declining soil fertility and climate change impacts. Fruit-based agroforestry systems, combined with integrated nutrient management offer a promising approach to enhance productivity, soil health and carbon storage, particularly in Vindhyan region of India. The present investigation aimed at (i) assessing the impact of fruit-based agroforestry systems and integrated nutrient management on crop productivity, soil properties and profitability compared to sole cropping; and (ii) quantifying the biomass and carbon storage potential of agroforestry systems. The experiment used split plot design wherein land use systems (custard apple-, bael-, guava-based agri-horti system, and open field) as main plot factor and nutrient management practices (N1: control, N2: 75% RDF+25% FYM, N3 :50% RDF+25% FYM+25% Vermicompost, N4: 75% RDF+25% Vermicompost, N5: 50% RDF+25% Vermicompost+25% Poultry manure and N6: 50% RDF+50% Poultry manure) were allocated as sub plot factor. Agroforestry systems showed a moderate reduction (6–27%) in mungbean yield compared to sole cropping due to tree-crop competition, but significantly improved soil quality, soil organic carbon (16–24%), nutrient availability and microbial activity. Among nutrient management treatments, integrated application of 50% RDF + 25% vermicompost + 25% poultry manure (N5) resulted in the highest crop productivity and soil fertility. Bael-based systems recorded the highest biomass and carbon stock, while custard apple-based systems yielded maximum economic returns. This study demonstrates that fruit-based agroforestry combined with integrated nutrient management is an effective strategy for improving soil health, enhancing carbon storage and increasing farm profitability in resource-constrained regions. It provides practical insights for promoting climate-resilient and economically viable land-use systems in semi-arid and degraded landscapes.