Studies On The Technology Integration Of Rice Production With High Efficiency In The Doubble-rice-Cropping Region

A demonstration and extension base of the project "National food fertility science and technology engineering" in Yingfengqiao town in Ziyang district of Yiyang city was utilized to study, the effect of the technology integration for high-quality rice production with food fertility and harmlessness on the rice yield and quality, also discuss the effect of different technology integration on plant diseases, insect pests and weed in high-quality rice paddy field; to study the technology integration for "Three high" production of high protein fodder rice, and discuss the effect of different technology integration on the yield and protein content of fodder rice; to study the technology integration of labor-saving cultivation, and discuss the effect of different technology integration on agronomical properties, yield and economic efficiency. The main resuts were as following:The yield and quality properties were different among different high-quality rice varieties. The results showed that the yield and quality properties of Xiangliangyou 68 and Zhuliangyou 819 in early rice and Fengyou 299, Peiliang 288 and Jinyou 207 in late rice were better. Different technology integrationon had different effect on the yield and quality of high-quality rice. The relsuts showed that rice-duck intergrowth and rice-duck intergrowth combined with biogas sludge application in early rice increased high-quality rice yield and its quality, and so did rice-duck intergrowth and rice-duck intergrowth combined rice straw returning in late rice.The yield and quality of fodder rice were significantly affected by different technology integration. The treatments of rice-duck intergrowth in early rice and rice-duck intergrowth combined with rice straw application in late rice had the best effect on increasing the fodder rice yield and protein content and brown rice rate. Simultaneously rice-duck intergrowth in early rice and rice-duck intergrowth combined with rice straw application in late rice could increase effective panicles, spikelets per panicle, seed setting percentage and thousand grains weight.Under the condition of the application of the techniques mentioned above, double cropping rice adopted with labor-saving cultivation had obvious growth predominance and well colony structure, and its economical yield and biomass yield were obiviously increased and synthetical efficiency were enhanced. Land productivity, labor productivity and cost-saving in the models of potato-double cropping rice were the best, followed by ryegrass-double cropping rice and spring forage triticale-double cropping rice, and that in fallow-double cropping rice were the lowest and followed by rapeseed-double cropping rice.