Residual effects of organic manure and micro nutrients on growth and yield parameters of green gram {Vigna radiata)' in potato-green gram sequence

摘要

Field experiment was conducted during summer season of 2010 and 2011, to assess the residual influence of organic manures and micro nutrients applied to potato on growth and yield of succeeding green gram in an organic cropping system, under alluvialsoil. The different sources of organic and micronutrients were integrated into 8 possible treatments viz. recommended dose of fertilizer-RDF (NPK @ 200 :150 :150 kg ha1) , 50% of RDF + well decomposed FYM @ lOt ha1, 50% of RDF + Neemcake @ 0.5t ha',RDF+Zinc sulphate @ 20kg ha'1 as soil application, RDF + ammonium molybdate @ 1kg ha'1 as soil application, RDF + Sodium tetraborate @ 1kg ha-1 as soil application, RDF + Tuber soaking with 40g zinc sulphate + 10g ammonium molybdate + 10g sodium tetraborate,RDF + foliar spray of 1% KN03 salt. After harvesting the main crop, green gram was raised as a residual crop on the same field without any alternation. During both the years of investigation, all the growth and yield attributes, yield (seed as well as haulm), of green gram were at their best with the residual effect of organic manure either with or without the use of chemical fertilizers. Growth, grain and haulm yields of green gram were significantly increased by the residual effect of organic manureand micro nutrients applied to the previous crop. Application of organic manure at the rate of 50% RDF + 1 Ot FYM ha1, recorded highest grain and haulm yields of 952.05 and 2638.85 kg ha"1 respectively. Though residual effect of micro nutrients has significant effect on growth, grain and stover yield of succeeding Green gram, the yield are reduced drastically.