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Short Term Effect of Application of Fertilizers on Soil Organic Carbon and Wheat Yield in Mid-Hill of Gorkha
Sumana Devkota

Last modified: 2017-08-29


Balanced application of organic and inorganic fertilizers in farming practices may enhance the soil organic carbon dynamics, improves other soil properties and wheat yield. A short term experiment was conducted in hilly region of Gorkha having randomized block design with three replication in winter wheat cropping system. Four fertilizer treatments were control (C), nitrogen fertilizer (N), farmyard manure (FYM) and farmyard manure + nitrogen fertilizer (FYM + N). Soil samples were collected from the depth of 0–10 cm and 11–20 cm. The main objective of this research was to measure changes in Soil Organic Carbon (SOC) stock and wheat yield after the application of organic and inorganic fertilizers. The SOC stock of experimental site ranged between 21 tC/ha to 27 tC/ha. Results showed that application of FYM significantly affect the SOC stock between treatments but cannot made a significant difference in SOC stock among the treatments. Meanwhile, there is mean increase in SOC stock in the range of 0.52–0.67 tC/ha in the treatments that uses FYM and FYM + N in both soil depth whereas C and N remain constant. A short term fertilization cannot made a vast significant influence in SOC stock and other soil properties. At the same time, wheat yield was significantly affected by the fertilizer with higher yield in the treatment that uses FYM + N i.e. 2440.07 Kg/ha followed by FYM i.e. 1044.78 Kg/ha. These results indicate that balanced application of farmyard manures and inorganic fertilizers can improve crop yield in short period of time and is beneficial to build degrading soil C.


Key words: Balanced application, Cropping system, SOC stock, Treatments


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