Vol. 7, Special Issue 1 (2018)
Growth, yield and economics of rice-wheat system as influenced by integration of organic sources and inorganic fertilizer
Author(s): Akhilesh Sah, Md. Naiyar Ali, DN Singh and MS Yadav
Abstract: A field experiment was conducted with objective to find out long term effect of combination of organic sources and inorganic fertilizer on growth, yield and economics under rice-wheat cropping system in Indo-Gangetic Plains. The highest plant height, number of tillers per square meter, length of panicle/earhead, weight of panicle/earhead and test weight of rice and wheat was recorded in treatment getting 50% N through FYM and 50% RDF through inorganic fertilizers and was significantly higher than rest of the treatments except T7, T8, T10 and T11, which were at par with each other. Data showed that substitution of either 50% or 25% N through organic sources had established superiority over the application of 100% recommended dose of fertilizers only in inorganic form. Treatment getting 50% N through FYM and 50% RDF through inorganic fertilizers produced significantly higher grain yield (5562, 4377 and 12185 kg/ha) of rice and wheat as well as rice equivalent yield, respectively. Treatment getting 50% N through FYM and 50% RDF through inorganic fertilizers recorded higher net returns and B: C ratio (Rs.36735, Rs. 49951, Rs. 86686, 1.02, 1.62 and 1.30 in rice, wheat and rice-wheat system, respectively). It may be summarized as organo-inorganic combination as integrated nutrient supply system is superior to use of inorganic fertilizers alone. Organic sources even in their moderate doses substituting only 25% of recommended N in the base crop of the cropping system, are capable of improving physical, chemical as well as biological properties of soil up to a considerable extent. Substitution of 50% N either through FYM or wheat straw or green manuring+50% RDF through inorganic fertilizers in rice followed by 100% RDF through inorganic fertilizers in wheat is the best mechanism for raising crop productivity.
How to cite this article:
Akhilesh Sah, Md. Naiyar Ali, DN Singh and MS Yadav. Growth, yield and economics of rice-wheat system as influenced by integration of organic sources and inorganic fertilizer. 2018; 7(1S): 1109-1115.