期刊
JOURNAL OF PLANT NUTRITION
卷 41, 期 18, 页码 2365-2375出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2018.1510509
关键词
apparent nutrient balance; FYM; green manure; rice-wheat; sustainable yield index; yield trends
资金
- All India Co-ordinated Research Project on Integrated Farming Systems - Indian Council of Agricultural Research (ICAR), Govt. of India
We analyzed data from a long-term rice-wheat cropping sequence to evaluate the effects of integrated nutrient management (INM) on yield trends and sustainability, nutrient balance and soil fertility of the system. After 30th cycle, grain yield of both the crops significantly declined under control and highest rice and wheat grain yields were obtained when 50% N supplied through green manure and farm yard manure, respectively. The magnitude of yield slope under INM was found considerably higher than 100% recommended fertilizer (RDF). Sustainable yield index (SYI) for both the crops were found lower in control but considerably higher with the 100% RDF and under INM. The soils under all the treatments suffered an apparent loss of K and N (except where organics replacing 50% N). Correlation study also reveals K is the sole factor for the yield sustainability as apparent K balance was negatively correlated with SYI and yield slope.
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