干旱区生态环境知识资源中心(Arid): 地下调亏滴灌对紫花苜蓿耗水、产量和品质的影响

Arid

	地下调亏滴灌对紫花苜蓿耗水、产量和品质的影响
其他题名	Effects of regulated deficit irrigation on water consumption, hay yield and quality of alfalfa under subsurface drip irrigation
	寇丹; 苏德荣; 吴迪; 李岩
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2014
卷号	30 期号:2 页码:116-123
中文摘要	地下滴灌技术是最为节水的灌溉技术,为了推进地下滴灌技术在紫花苜蓿生产中的应用,2012年在甘肃武威开展了大田试验,通过对建植当年第2茬苜蓿不同生育期设置不同的亏水处理,研究了地下滴灌条件下调亏灌溉对紫花苜蓿耗水、产量和品质的影响。结果表明:随亏水程度的加重,紫花苜蓿的产量降低,耗水量减少,水分利用效率(WUE)提高,干重茎叶比降低,粗蛋白含量提高,粗蛋白产量降低;全生育期调亏,生育期间的耗水强度呈现现蕾期>分枝期>分枝前期的规律,并且随着亏水程度的增加,规律愈加明显;分枝期调亏的紫花苜蓿,在现蕾期复水后耗水强度有明显的补偿效应;与现蕾期调亏相比,分枝前期和分枝期调亏有利于降低茎叶比,提高粗蛋白质量分数和粗蛋白产量。该研究揭示了地下滴灌条件下不同调亏处理对紫花苜蓿耗水、产量和品质的影响,为干旱地区优质、高产、节水苜蓿的生产提供了试验依据。
英文摘要	Subsurface drip irrigation (SDI) and regulated deficit irrigation(RDI)are two of the most water-saving irrigation technologies nowadays. In order to study effects of regulated deficit irrigation on forage water consumption, hay yield and quality of alfalfa under subsurface drip irrigation, a field experiment was carried out in 2012 at Shiyang River Drainage Basin, northwest of China. Alfalfa used for the experiment is the second cutting of the establishment year, and the cutting is separated into 3 periods, including pre-branching period, branching period and squaring period. There are seven irrigation treatments in the experiment design. Four of the seven treatments are regulated in whole growth period, lower irrigation limits respectively 70% FC (field capacity)、60%FC (field capacity)、50%FC (field capacity)、40%FC (field capacity), and three are regulated in different growth periods, lower irrigation limits of pre-branching period, branching period and squaring period of different treatment respectively (50%, 50%, 70%)FC, (60%, 60%, 70%)FC, (70%, 70%, 50%)FC. When the soil water content arrives to the designed lower irrigation limit, each plot starts to irrigate. Irrigation amount is 20mm every time. According to these treatments, the effect on water consumption, hay yield and quality of alfalfa of regulated deficit irrigation (RDI) under subsurface drip irrigation(SDI) are studied. The results show with the deterioration of the water deficit degree, alfalfa yield, water consumption, stem/leaf ratio and yield of crude protein (CP) decrease while WUE (water use efficiency) and content of the crude protein (CP) increase, and 60%FC is a critical value. When the lower irrigation limits are higher than 60%FC, hay yield of alfalfa decrease non-significantly, however, when lower than 60%FC, hay yield decrease significantly. While RDI (regulated deficit irrigation) is taken in the whole growth period, squaring period>branching period>pre-branching period appears in water consumption rate during different periods of alfalfa. And this law is more and more significant with the increasing of the water deficit degree. When RDI (regulated deficit irrigation) is taken in branching period, water consumption rate of alfalfa have apparent compensation effect after sufficient irrigation in squaring period. Compared with regulating deficit in squaring period, taking RDI (regulated deficit irrigation) in pre-branching and branching period is more conducive to improve alfalfa quality by reducing stem/leaf ratio and improving content of crude protein (CP) and yield of crude protein. When lower irrigation limits of pre-branching period, branching period and squaring period are 60%FC, 60%FC and 70%FC respectively, alfalfa has the highest crude protein yield (846.11kg/hm2). This study reveals the effects of RDI on water consumption, yield and quality of alfalfa under SDI and provides an experimental base of high quality, high yield and water saving in alfalfa industry in arid areas.
中文关键词	灌溉 ; 蒸散 ; 品质控制 ; 地下滴灌 ; 调亏灌溉 ; 紫花苜蓿 ; 产量
英文关键词	irrigation evapotranspiration quality control SDI RDI alfalfa yield
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5047493
来源机构	北京林业大学 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231463
作者单位	寇丹, 北京林业大学草地资源与生态研究中心, 北京 100083, 中国.; 苏德荣, 北京林业大学草地资源与生态研究中心, 北京 100083, 中国.; 李岩, 北京林业大学草地资源与生态研究中心, 北京 100083, 中国.; 吴迪, 中国农业大学水利与土木工程学院, 北京 100083, 中国.
推荐引用方式 GB/T 7714	寇丹,苏德荣,吴迪,等. 地下调亏滴灌对紫花苜蓿耗水、产量和品质的影响[J]. 北京林业大学, 中国农业大学,2014,30(2):116-123.
APA	寇丹,苏德荣,吴迪,&李岩.(2014).地下调亏滴灌对紫花苜蓿耗水、产量和品质的影响.农业工程学报,30(2),116-123.
MLA	寇丹,et al."地下调亏滴灌对紫花苜蓿耗水、产量和品质的影响".农业工程学报 30.2(2014):116-123.