Effect of Integrated Nutrient Management on Physico-chemical Soil Properties Under Rice
Maneesh Kumar1, Avinash Kumar Rai1, Sumit Rai1*, Priyanka Rani1 and Mohsina Anjum1
1Department of Soil Science & Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi – 221005, India. 2Department of Agricultural Chemistry & Soil Science, Udai Pratap Autonomous College, Varanasi- 221002, India.
Received on 25 April 2016 and accepted on 09 June 2016
ABSTRACT
A field experiment was conducted during Kharif season (2010) to find out the effect of integrated use of urea, zinc, poultry manure and Azotobacter on physico-chemical properties, available NPKS content of soil under rice crop (Oryza sativa L.). The experiment was laid out in Randomized Block Design (RBD) during kharif seasons with seven treatments and three replications. The details of various treatments applied to rice crop are as follows: T1 (Control); T2 (100% RDF); T3(100% RDF+ Zn); T4 (50 % RDF + 50 % N through urea); T5 (50 % N through poultry manure + 50 % N through urea + Zn); T6 (50 % N through poultry manure + 25 % N through urea+ Azotobacter); T7 (50 % N through poultry manure + 25 % N through urea + Azotobacter + Zn). The integrated use of poultry manure along with urea, zinc and Azotobacter were found to build up in organic carbon, available N, P, K and S content of soil under rice plants significantly over the sole use of chemical fertilizer. The plots which had received poultry manure and chemical fertilizers with Azotobacter showed significant improvement in residual soil fertility. It could also be concluded that the application of poultry manure with Azotobacter has good performance over sole application of manure.
Keywords
Azotobacter, urea, zinc, physico-chemical properties, available NPKS.