Characteristics and Key Cultivation Techniques of Maize High Yield Plots in Yellow River Irrigation Areas of Ningxia

Wang Yonghong;Zhao Rulang;Zhao Jian;Sun Faguo;Xie Tiena;Zhang Wenjie;Institute of Crops Research,Ningxia Academy of Agriculture and Forestry Sciences;Agricultural Technology Extension Center County;College of Agronomy,Ningxia University;

Yellow River Irrigation Areas of Ningxia;;Maize;;High-yield plot;;Yield structure;;Key cultivation technology

This paper analysis characteristics of 27 maize high yield plots in Yellow River Irrigation Areas of Ningxia in 2007- 2011. In the 27 maize high yield plots,the average yield was 16 692. 0kg / hm2,the number of ears was89 331. 0 / hm2,the grains per ear were 568. 2,1000-seed-weight was 350. 6g,and the average grains weight per ear was 193. 4g. The high-yield maize plots distributed all Yellow River Irrigation Areas of Ningxia. But large area production was concentrated in the Yellow River surrounding irrigation areas and new supplement irrigation area of middle in Ningxia. These areas have abundant Solar-thermal resources,concentrated planted single maize,and most soil is silty loam,Main planting type was resistant varieties of Zhengdan 958 and Xianyu 335. Correlation analysis results showed that the decision to production priority sequence first was regional resources,then decided by irrigation of field conditions,geographical condition and fertilizer levels,planting density,varieties,seeding quality and field management,etc.; Increasing planting density is an effective way to achieve 15 000kg / hm2of high yield,but should strengthen the water regulation and rational cultivation management,optimizing the population structure,and improve the grains weight per ear is also important.