Vol. 12 (3&4) : May-August, 2021 Issue
Effect of long-term fertilization on soil carbon dynamics in rice-rice cropping system of Onattukara
G. KAVYASREE1 and V. MINI2
Department of Soil Science and Agricultural Chemistry, College of Agriculture,Vellayani, Thiruvanathapuram-695522.(Kerala)
Designation : 1PG Scholar *( srevyasgk@gmail.com), 2Assistant Professor
Subject : Agronomy and Crop Production
Paper No. :
Total Pages : 5
Received :
Revised accepted :
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Citation :
Kavyasre, G.,and Mini, V. 2021. Effect of long-term fertilization on soil carbon dynamics in rice-rice cropping system of Onattukara. Green Farming Vol. 12(2&3):132-136. May – August, 2021.
ABSTRACT
A study was conducted at long term fertilization experiment conducted under rice-rice cropping sequence since 1964 at Onattukara Regional Agricultural Research Station, Kayamkulam, Kerala on yield and active pools of soil organic carbon. The effect of various doses of N, P, and K fertilizer on biometric, yield attributes and active pools of carbon in rice-rice cropping sequence was studied. The results revealed that highest biometric observations, yield attributes, grain yield, straw yield and active carbon pool was obtained under integrated nutrient management (NPK+FYM). These results indicated that the application of FYM along with NPK fertilizers resulted in significant increase in active pools of carbon and yield in rice. Hence it can be recommended as the best management practice. Sensitivity index of different carbon fractions were also studied to find the sensitivity of each fraction to management practices.
Key words :
Biometric observations, FYM, INM, NPK, Rice cropping sequence, Soil organic carbon
