冬小麦轮选987的生育特性及节水高产栽培技术研究

Research on the Character of Winter Wheat——Lunxuan 987 Growth and Development and its Water-saving and High-yielding Cultivation Technique

[目的]明确冬小麦轮选987的高产潜力。[方法]在河北省定兴县大田限水条件下,对冬小麦轮选987群体生长发育动态及节水高产栽培技术进行了研究。[结果]轮选987在有机质18.3g/kg,碱解氮105.0mg/kg,速效磷26.0mg/kg,速效钾104.0mg/kg的试验地上种植,全生育期只灌3水,实现了8352.7kg/hm2的产量水平,产量构成因素为:总穗数792.8万/hm2,穗粒数26.4粒,千粒重45.7g。主要群体指标为:孕穗期叶面积指数达最高值,平均为6.90,开花后叶面积指数缓慢下降;生物产量为19172.7kg/hm2,经济系数为0.436。[结论]轮选987品种适应性强,增产潜力大,适宜在河北省定兴县及保定市北部冬麦区进行推广种植。

[Objective] The high yield potentiality of the winter wheat——Lunxuan 987 would be elucidated through the research. [Method] The dynamic of Lunxuan 987 population growth and development and its water-saving and high-yielding cultural technique under the condition of limited irrigation in Dingxing County of Hebei Province were experimented. [Results] The result showed that the Lunxuan 987 yield could reach at the level of 8 352.7 kg/hm^2 while the application amount of organic matter was 18.3 g/kg; alkaline-N,105.0 mg/kg;quick-acting P,26.0 mg/kg; quick-acting K,104.0 mg/kg and three times＇ irrigation in its entire growing duration; and the component of winter wheat yield were total number of spike was 7.928 million spikes per hm^2; the number of grain per spike,26.4 grains and 1 000 grain weight,45.7 g. Main population index was that the highest leaf area index（LAI） appeared in the booting stage,with average value of 6.90; and the LAI slowly declined after flowering; the biological yield was 19 172.7 kg/hm^2 and the harvest index was 0.436. [Conclusion] The winter wheat——Lunxuan 987 was with good adaptability and high yielding potentiality,which was suitable for the extension in the Dingxian County and northern Boading City of Hebei Province.