灌溉量对草坪草地上、地下植物量分配的影响  

The effect of irrigation on allocation of above and under ground biomass of turfgrass

作　　者：史晓霞[1] 师尚礼[1] 刘自学[2] 何军[2] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]北京克劳沃集团,北京100029

出　　处：《草业科学》2007年第2期85-91,共7页Pratacultural Science

基　　金：北京克劳沃草业技术开发中心关于"北京地区草坪草需水规律研究"项目

摘　　要：采用大田试验和室内分析相结合的方法,探讨了灌溉与草坪草地上及地下植物量的关系,结果表明:草坪草的生长速度随着水分的增加而增加,草坪草的生长具有时滞性,生长模式遵循“慢-快-慢”的规律;整个生长期内草坪草修剪植物量大小顺序为:高羊茅Festuca arundinacea>草地早熟禾Poa pratensis>多年生黑麦草Lolium perenne,与生长速度呈显著正相关;叶片含水量与土壤储水量之间呈正相关,与气温呈负相关;轻度水分胁迫下水分利用效率较高;对水分的敏感性,黑麦草最强,高羊茅最弱;地下植物量最大值出现在春季,秋季为根系的恢复生长期;轻度水分胁迫有助于根系的生长,充足水分条件不利于高羊茅根系生长;根系的空间分布呈乘幂函数关系。The relationship between irrigation and above--under ground biomass of turfgrass was studied by field and indoor experiments. The results indicated that the growth rate of turfgrass increased with increasing water supply, it Showed ＂fast--slow--fast＂ rule. During the whole growing season, biomass cut from turfgrass ranked as tall fescue〉bluegrass〉perennial ryegrass, indicating a significant positive correlation with growth rate. Moisture content of leaf was positively correlated with soil water content and negatively correlated with temperature. Water use efficiency increased under slight water stress. Perennial ryegrass was most sensitive to water deficiency and tall fescue was tolerant. The highest underground biomass accumulated in spring and root system resumed to grow in fall. Slight water stress benefited root system and adequate water was bad for tall fescue root system devel- opment. The special distribution of root system showed power function relationship.

关 键 词：草坪苹 灌溉 生长速度 植物量 

分 类 号：S688.4[农业科学—观赏园艺]