Abstract:
In order to promote the rapid improvement and efficient utilization of saline-alkali soil,in this experiment without fertilization(T0),conventional fertilization(T1)and combined application of chemical fertilizer(T2)were used as control to study the effects of combination of organic material and chemical fertilizerbiochar organic fertilizer with chemical fertilizer(T3),straw organic fertilizer with chemical fertilizer(T4),straw organic fertilizer and microbial fertilizer with chemical fertilizer(T5)on yield and quality of rice.The results showed that soil pH and electrical conductivity were decreased by using combination of organic material and chemical fertilizer,which were beneficial to saline-alkali soil improvement.Compared with the treatment without organic material,rice yield were increased by chemical fertilizer combined with organic material.The highest yield was chemical fertilizer combined with straw organic fertilizer and biological bacterial fertilizer(T5).The theoretical yield of Longdao 21increased range was 12.76%-189.87%,and that of Haidao 2was88.46%-151.40%.The treatment combined with organic material had the longer panicle length,more grains per panicle,plant height,grain weight,the seed setting rate and 1 000-grain weight were higher than those without the organic material treatment.The correlation coefficients between the four yield components and yield were the grains number per panicle>the seed setting rate>the number of panicles>1 000-grain weight.On the basis of ensuring yield,the application of chemical fertilizers with different organic materials could improve the processing quality and taste value of rice,and reduce the protein content.The rice quality was the best treated with chemical fertilizer combined with biochar organic fertilizer.