灌溉地不同人工牧草草地土壤水分及生长特征变化

对2003-2005年人工牧草草地不同深度不同时间灌水前后的水分变化特征进行研究,发现0-40 cm含水率变化大而且快称多变层;40-80 cm牧草水分利用层,80-100 cm稳定贮水层。分析美国大叶、德国大叶、沙打旺、红豆草生长状况,在相同气候和管理条件下美国大叶单株鲜重最大。用土壤水分平衡法估算美国大叶、沙打旺两种牧草的全年耗水量和土壤水分贡献系数,结果表明,在干旱缺水地区种植美国大叶是发展草产业的较好品种。

The soil moisture and growth characteristic change of different forage grass in fills membrance place

Using the forage grass experimental materials from 2003 to 2005,the article analysis the moisture changeable characteristics of different depth and time,before and after irrigation.The result was divided big and quick moisture consent changeable level;the moisture using level and stable water storage level.The big influence environmental factors to lawn moisture,first was filed accumulated temperature,second was precipitation and accumulated temperature.Analysising the Meiguodaye、Deguodaye、Shadawang and Hongdoucao's growth condition,Under the same climate and management condition,Meiguodaye grow quick and fresh weight were many.With soil moisture zero-method simulating Meiguodaye and Shadawang's year water consumption and soil water contribution coefficient,the result was planting Meiguodaye was more save water than planting wheat and corn in drought region.It was also first choice variety in grass industry.