Nitrogen and phosphorous use optimization in corn production with mycorrhiza and vermicompost utilization

This research was don to investigate the effect of mycorrhiza and vermicompost as the biological fertilizers to compare with chemical fertilizer phosphorous and nitrogen on yield and yield component of corn. It was based on factorial in a RCBD with 3 replications when soil control condition was some in 2010. Treatment were considered as using chemical fertilizer (F) in three levels of fertilizer's sources, urea, triple super phosphate and potassium include: F0 (N=0, P=0, K=0), F1 (N=70, P=50, K=30) and F2 (N=150, P=100 and K=50) kg/ha, vermicompost treatment in two levels (using V1 and non-using V0) and mycorrhiza treatment in two levels (using M1 and non-using M0) (population 105 g/spore). Results of variance analysis showed there was significant different between different levels’ interaction of vermicompost, chemical fertilizer and mycorrhiza on grain yield p=1% and there isn’t any significant difference between the kernel number and 1000 kernel weight. Comparing the average of interaction of vermicompost, mycorrhiza and chemical fertilizer showed significant difference on grain yield, that treatment V1F0M1 and V1F1M1 with averages 119.33 and 113.00 g/pot have higher amount of grain yield than teratmentV1F2M1 with average 106.33 g/plant, and treatment V1F0M0 with average 87.00 g/plant has lowest amount of grain yield. Comparing the average of vermicompost interaction, fertilizer’s level and myeorrhiza showed significant difference on the 1000 kernel weight and treatment V1F0M1 with average 168.33 g has highest weight of 1000 kernel weight and treatment V1F1M1 with average 134.67 g has lowest weight of 1000 grains. Use of mycorrhiza and vermicompost in low levels of chemical fertilizer could cause increase of yield and grain yield component but in high levels of chemical fertilizer their activity became hampered.