Effects of organic fertilizers on yield and quality of rice grains and nitrogen use efficiency

A field plot experiment was conducted to study effect of organic fertilizers on yield and quality of rice grains and nitrogen use efficiency.The results showed that,the rice yield is much higher under the facility treatments of 20% pig manure and 10% pig manure decomposed organic fertilizer and 20% biogas fertilizer instead of pure fertilizer treatments.Compared with CK treatments the rice yield respectively increased by 103.49%,81.62% and 74.64% under the three treatments and increased by 38.67%,23.77% and 19.02% than that of the pure fertilizer treatments.The 20% pig manure decomposed organic fertilizer instead of 20% nitrogen fertilizer had the highest nitrogen use efficiency of 32.64% which was 2.66% higher than pure chemical fertilizer.And both that of 20% pig manure and 10% pig manure decomposed organic fertilizer were higher compared to the pure fertilizer treatments with the growth of 1.12% and 1.04%.According to the results,we organic fertilizer can increase the rice yield and nitrogen fertilizer use efficiency.Furthermore,compared with pure fertilizer treatment,replacing the same proportion of chemical fertilizer by either 10% of the straw,or 20% of the pig manure,or 30% of the pig manure organic fertilizer or 20% biogas could lower chalk whiteneww.And replacement of the same proportion of chemical nitrogen fertilizer by either 20% of pig manure or 20%,or 10% or 30% of pig manure decomposed fertilizer could improve the rice gel consistency,10% of the straw instead of 10% chemical fertilizer treatment had a lower amylase content.In conclusion,organic fertilizers could improve the appearance quality of rice and cooking quality.