摘要
为了查明景泰地区紫花苜蓿Medicago saliva生育期灌溉量与产草量的关系，探索既能使紫花苜蓿高产，又能节约用水的灌溉模式，对不同灌溉条件下紫花苜蓿的鲜草产量和经济效益进行研究．确定出最适宜的灌溉量。试验结果表明．紫花苜蓿生长期，在20～40cm土层内．土壤水分含量达到30％左右时，紫花苜蓿均能良好生长，鲜苹产量随灌溉量增加而增长．增产幅度也逐渐增大；但当灌溉总量达到5400m^2／hm^2时．灌溉量增加对苜蓿增产幅度影响不明显．灌溉总量4800m^2／hm^2左右时经济效益最高。
The fresh yield of alfalfa （Medicago sativa） and economic efficiency under different irriga- tion amounts were studied for exploring the water-saving and high yield irrigation patterns in Jingtai. The result indicated that the proper soil moisture within 20 to 40 cm in the growth period was 30% and the yield increased along with the increasing of irrigation amount, however, while the total irrigation amount reached 5 400 m^2/hm^2, the effect was not significant. The economic efficiency reached the highest while the total irrigation amount was around 5 400 m^2/hm^2.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第10期181-183,共3页
Pratacultural Science
关键词
灌溉
苜蓿
产量
irrigation
alfalfa
yield
