Evaluation of balanced nutrient application for improving productivity and nutrient-use efficiency of rice (Oryza sativa)green gram (Vigna radiata) cropping system in Coastal ecosystem
DOI:
https://doi.org/10.59797/ija.v64i3.5274Keywords:
Balanced nutrition, Economics, Nutrient-use efficiency, Nutrient uptake, Ricegreen gram system, Sustainable yield indexAbstract
An on-farm experiment involving 96 farmers (24 farmers/year) in farmers participatory mode was conducted during 201112 to 201415 in Mandirbazar and Kakdwip blocks of South 24 Parganas district, West Bengal to study the response of rice (Oryza sativa L.)green gram [Vigna radiata (L.) Wilczek] cropping system to balanced nutrition. Both the crops of the experiment were treated with 7 nutrient combinations, viz. control, recommended N alone (80 kg N to rice and 20 kg to green gram), N with P (40 kg P O /ha), N with K (40 kg K O/ha) to both the 2 5 2 crop, N with P+K, N with P+K+Zn (25 kg ZnSO ) (Zn only to rice) and farmers practice which were replicated at 24 4 fields in 6 villages of the blocks. Application of 80 kg N, 40 kg P O and 40 kg K O along with 25 kg ZnSO /ha to 2 5 2 4 rice alone recorded significantly higher grain (4.51 t/ha) as well as straw (6.48 t/ha) yield of rice, while 20 kg N, 40 kg P O and 40 kg K O/ha recorded significantly higher seed (0.92 t/ha) yield in the succeeding green gram. The 2 5 2 maximum system rice equivalent yield (8.81 t/ha) and unit time system productivity (24 kg/ha/day) were also ob- served under balanced application of nutrients. Higher partial factor productivity (PFP) for N and K was recorded under farmers practice and the same for P was higher under application of N with P+K+Zn. Significantly higher net returns ( 46,994/ha) with cost of cultivation of 62,710/ha, B:C ratio (1.76) and sustainable yield index (0.83) were recorded with application of N with P+K and Zn to rice and N+P+K alone to greeng ram in the system. Agro- nomic efficiency (AE) of applied nutrients were observed to be in the order of NReferences
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