摘要
分析紫花苜蓿Medicago sativa地上生物量的变化表明:鲜、干质量曲线的增长特点是返青(萌芽)至现蕾后增长快,进入开花期后增长缓慢;第1茬鲜质量和干质量占全年总鲜质量和干质量的比例最大,高度与鲜质量和干质量的增长成正相关;在不同茬的生长期内,气象要素对其贡献不同,水分利用率以第2茬最高。
The change of alfalfa aboveground biomass showed that high growth speed was observed from seedling to bud, and reduced after blooming. The fresh and dry weight of the first cutting ac counted majority of the total yield. Plant height was positively correlated to the increase of yield.Weather factors contributed differently during different growth period of cuttings. While the highest water use efficiency was observed at the second cutting.
出处
《草业科学》
CAS
CSCD
2006年第1期55-58,共4页
Pratacultural Science
基金
兰州区域气象中心开放实验室项目"农牧区草业生态观测试验及气候对草业生产影响评估方法研究"
关键词
紫花苜蓿
鲜质量
干质量
水分利用
alfalfa
fresh weight
dry weight
water use efficiency
