3种冷季型草坪草蒸散量的SPAC法研究
Study on evapotranspiration of three cold-season turfgrasses by using SPAC

刘艺杉 ¹ 刘自学 ¹ ^* 李晓光 ¹ 孙涛 ² 张自和 ³

文摘	以北京地区常见的3种草坪草多年生黑麦草Lolium perenne、草地早熟禾Poa pratensis和高羊茅Festuca arundinacea为研究对象,采用田间试验和实验室内分析相结合,对3种冷季型草坪草年季间蒸散量(ET)动态变化进行初步研究.结果表明:3种草坪草ET每15 d的动态变化趋势基本一致,草种间的ET和蒸散强度,除了4月下旬到5月初这段时间之外,多年生黑麦草的ET均高于高羊茅和草地早熟禾.3种草ET在不同季节变化很大, 6月上中旬为整个生长季的最高值,随后下降,8月下旬到9月中旬又回升,越冬前ET再次下降并达到整个生长季的最低点.3种草坪草坪草系数(K_C)多年生黑麦草最高为1.03,高羊茅和草地早熟禾分别为0.89和0.87.
其他语种文摘	The evapotranspiration dynamic of three cold-season turfgrasses (Lolium perenne, Poa pratensis , Festuca arundinacea) were studied in Beijing area using field test combined with laboratory analysis. The results showed that the evapotranspiration dynamic of 3 cold-season turfgrasses with 15 days interval kept a similar tendency. The evapotranspiration of L. perenne was higher than others except for the period from late April to early May. The evapotranspiration of 3 turfgrasses was obvious different among different seasons, the highest value appeared in mid June, and followed by that in late August and mid September, and the lowest value appeared before winter. The K_C of L. perenne was the largest (1.03), and followed by F. arundinacea (0.89) and P. pratensis (0.87).
来源	草业科学 ,2009,26(10):165-170 【扩展库】
关键词	草坪草 ; 蒸散量 ; 冷季型 ; SPAC
地址	1. 北京克劳沃草业技术开发中心, 北京, 100029 2. 中科院西北高原生物研究所, 青海, 西宁, 810000 3. 兰州大学草地农业科技学院, 甘肃, 兰州, 730020
语种	中文
文献类型	研究性论文
ISSN	1001-0629
学科	园艺
基金	全国牧草种质资源保护项目
文献收藏号	CSCD:3690235