北疆地区干旱荒漠草地牧草需水量与需水规律研究

Water Requirement and Its Law in Arid Desert Grassland of Northern Xinjiang

新疆北部阿勒泰草原的草地生产主要是在荒漠瘠薄的土地上开发和发展起来的,通过对联合国"2817项目"1990—1994年牧草灌溉试验数据进行分析比较,初步得到该区域苜蓿土壤水分与生长发育及产量关系。结果表明,苜蓿在全年中收获3茬,每一茬中各生育阶段的需水强度不同,苜蓿的整个生长期中有3个需水高峰,分别为7.4、9.5、9.0 mm/d。整个生长期为173 d,需水量为810 mm,全生育期内日最大需水量为11 mm/d。

The yielding of Altay prairie was mainly developed on barren desert land.This article analyzed and compared test data based on the irrigation experiment of United Nation＇s ＂2817 Project＂ between 1990—1994 year,and got soil moisture and alfalfa growth and yield relationships preliminary of this region.The results showed that,alfalfa can be harvested three times one year and the strength of water requirement were different in each growth stage,and alfalfa has three peak of water requirement throughout the whole growing season which were 7.4,9.5 and 9.0 mm/d.The whole growth period was 173 days,and the water requirement was 810 mm,and the daily maximum water requirement was 11 mm/d.