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切根对紫花苜蓿生产的影响 被引量:3

The influence of roots cutting technology on alfalfa production
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摘要 根据石河子莫索湾垦区气候条件和滴灌技术,采取切根延长紫花苜蓿(Medicago sativa)留床时间方式,对苜蓿产量和经济效益及增产因素进行分析,以降低苜蓿生产成本,提高苜蓿生产经济效益。结果表明,1)切根紫花苜蓿比未切根的返青期提前4d,且切根紫花苜蓿4茬的分枝密度和高度均比未切根的高;2)未切根与切根紫花苜蓿的产草量均在播种后的第3年和第4年达最大值,第3年紫花苜蓿切根处理后,其第4-6年的产草量分别比未切根高14.4%、29.5%和26.7%;3)未切根和切根处理紫花苜蓿的水分利用效率第4年达高峰,分别为0.032和0.037kg·g-1,此后均迅速下降,与产量下降趋势一致。第4-6年,切根处理紫花苜蓿的经济效益比对照高15.29%(P<0.05)。 In the present study,the production,profits and factors increasing yields of alfalfa treated with roots cutting technology for extending the remaining period were analysis to reduce production cost and improve the economic benefit in Mosso Bay agricultural areas,Shihhotze based on local climatic conditions and drip irrigation technology.The results showed that regreening stage of alfalfa with root cutting advanced 4days than that of alfalfa without root cutting.For the first four crop,the branch density and height of alfalfa with root cutting were always higher than those of alfalfa without root cutting.The yields of alfalfa both with root cutting and without root cutting were highest in the 3rd and 4th year.The yields of alfalfa in 4th,5th and 6th with root cutting in 3rd year significantly increased(P〈0.05)by 14.4%,29.5% and 26.7%,respectively,compared with that of alfalfa without root cutting.The water use efficiency of alfalfa both with root cutting and without root cutting were highest in the 4th year which was 0.032 and 0.037kg·g^-1,respectively,and that of alfalfa decreased rapidly,the same trend for yield.Compared with alfalfa without root cutting,the profits of alfalfa production with root cutting increased by 15.29%from the fourth year to the sixth year.All of these results suggested that the roots cutting technology was very useful to improve alfalfa production in the studied area.
出处 《草业科学》 CAS CSCD 北大核心 2015年第7期1088-1092,共5页 Pratacultural Science
基金 国家科技支撑计划项目课题"新疆大型企业农牧循环关键技术研究与集成示范"(2012BAD14B10-2)
关键词 紫花苜蓿 切根 产量 经济效益 alfalfa roots cutting technology yield profits
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