摘要
我国人工牧草品种很多，其中一年内可以多次收获的牧草占有很大比重。目前我国对牧草全生育期需水特性研究成果较多，但对刈割条件牧草需水特性研究的却很少。刈割改变了牧草的生育过程，同样改变了牧草的需水规律。在实际制定牧草灌溉计划及水利工程规划设计中，通常采用的牧草需水量估算方法由于没有考虑刈割对牧草作物系的影响，使随季节而变化的需水量值都存在着超估现象，严重影响着灌溉计划和精确程度和水利工程的设计规模。本文以呼和浩特地区首信和苏丹草两种牧草为例，通过对全生育期和刈割条件下的需水规律及需水量的试验资料进行对比分析，论述广刈割条件牧草的需水特性和刈割对牧草作物系数的影响，旨在为估算刈割条件下牧草需水量提供科学依据。
There are many sorts forage plants to be planted in China A great dealof them can be cut down for several times in one year,As a matter of fact,We have achieved a great deal of results on the characteristics of forage plant's.Water require-ment during growth,but less was known when the plants suffer from cutting.Mowingcould change the growth process of plants as well as their water requirement.This arti-cle gives a comparative analysis on the influence of regular mowing on plant perfor-mance.In might be a scienfific basis for estimating the water一requirement of forageplants
基金
水利部科学基金
