灌溉对新麦草生长发育和种子质量的影响研究

在甘肃省酒泉市上坝地区开展新麦草灌溉试验，研究不同灌水次数和灌水量对新麦草生长发育、种子质量和经济效益的影响，结果表明：水分胁迫影响新麦草的生长发育进程，导致生育期缩短，生殖枝的穗、茎秆和叶片的干重以及种子千粒重显著（P〈0．05）降低；灌水4次处理的种子产量最高，为593.3kg／hm^2，种子质量和经济效益最好。研究认为，在酒泉地区适宜于新麦草种子生产的灌水次数为4次，每次的灌水量为600m3／hm^2。

Effect of Irrigation Times and Amount on the Growth and Seed Quality of Russian Wildrye

The field experiment was carried out to evaluate the effects of irrigation times and amount on the growth,seed quality and economic benefit of Russian wildrye in Shangba of Jiuquan of Gansu province.The results showed that different water treatments influence the growth of the plant in various degrees.Water-stress treatments shortened the plant growth period and diminish the spike,stems and leaves weight(g) of Russian wildrye besides the 1000-seed weight remarkably(P<0.05).The maximum value of actual seed yield,seed quality and economic benefit were obtained under irrigating four times(returning up period,jointing period,tasseling period and grouting period) from returning up to harvest.So it was reasonable for the Russian wildrye seed production that the irrigation times were four and irrigation amount was 600 m3/hm2 in Jiuquan district.