摘要
采用小型蒸渗仪法研究了北京地区中苜1号和WL323紫花苜蓿建植当年的耗水系数和水分利用效率。结果表明,中苜1号和WL323的生物产量耗水系数分别为915.0和939.7,经济产量耗水系数分别为786.9和808.1,2个品种之间差异不显著;不同茬次之间差异显著(P<0.05),第2茬最低,第3茬最高;中苜1号和WL323的地上部生物产量的水分利用效率分别为11.0和10.6kg/(mm.hm2),全部生物产量分别为19.2和17.9kg/(mm.hm2),经济产量水分利用效率分别为12.8和12.3kg/(mm.hm2),2个品种之间差异不显著;不同茬次之间差异显著(P<0.05),第2茬最高,第3茬最低。
The water consumption coefficient （WCC） and water use efficiency （WUE） of Zhongmu No. 1 and WL323 Medicago sativain the establishment year in the Beijing plain were studied with a micro-lysimeter. The WCCs based on biological yield of Zhongmu No. 1 and WL323 were 915.0 and 939.7 and based on economic yield were 786.9 and 808.1, respectively with no significant differences between varieties. The WCCs at different harvests were significantly different （P〈0.05）, and lowest at the 2^nd harvest but highest at the 3^rd harvest. The WUEs based on above-ground biological yield of Zhongmu No. 1 and WL323 were 11.0 and 10.6 kg/（mm · hm^2）, while those based on whole biological yield were 19.2 and 17.9 kg/（mm · hm^2） and those based on economic yield were 12.8 and 12.3 kg/ （mm · hm^2）, respectively. There were no significant differences between varieties. The WUEs at different harvests were significantly different（P〈0.05） and were highest at 2^nd but lowest at the 3^rd harvest.
出处
《草业学报》
CSCD
2007年第1期41-46,共6页
Acta Prataculturae Sinica
基金
农业部农业结构调整重大技术研究专项--人工草地肉羊繁育新技术与示范(04-13-01A)资助
关键词
北京地区
紫花苜蓿
蒸腾系数
耗水系数
水分利用效率
Beijing plain
Medicago sativa
transpiration coefficient
water consumption coefficient
water use efficiency
作者简介
孙洪仁（1965-）．男．吉林怀德人，副教授，硕士。E—mail：sunhongren@cau．edu．cn
通讯作者。
