干旱区生态环境知识资源中心(Arid): 不同草粮轮作方式对退化苜蓿草地水分恢复的影响

Arid

	不同草粮轮作方式对退化苜蓿草地水分恢复的影响
其他题名	Effects of different alfalfa-crop rotation patterns on water recovery of degradation alfalfa grassland
	刘沛松; 贾志宽; 李军; 王俊鹏; 韩清芳
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2010
卷号	26 期号:2 页码:95-102
中文摘要	2003-2005年在黄土高原宁南旱区10年生退化苜蓿草地上进行了连续3 a不同作物组合方式的轮作试验,轮作作物为春小麦、马铃薯和谷子,为研究比较不同轮作方式对退化苜蓿土壤水分的恢复状况和作物产量效益,优化出较为合理的草粮轮作模式.试验结果表明,轮作地0～60 cm土层土壤易受降水和地面蒸发影响,60～120cm土层土壤水分主要被轮作作物利用,而120～200 cm土层土壤水分相对较为稳定,受降水和地面蒸发影响很小,并随轮作年限的增加,基本上表现出不断恢复趋势.通过草粮轮作可以增加苜蓿地120～200 cm土层土壤水分,且显著高于撂荒地和对照苜蓿地,同时可获得一定作物产量.相对于其他轮作方式而言,马铃薯-马铃薯.春小麦(PPW)轮作处理能够充分利用有限的降水资源,对土壤水分具有较好的恢复作用,其作物总产量和水分利用效率均较高,分别为5214.5kh/hm~2和9.38 kg/(hm~2·mm~(-1)),与轮作前苜蓿地相比,120～200 cm土层土壤水分净恢复量为24.73 mm.
英文摘要	Experiments were carried out in the drought areas of southern Ningxia Hui Autonomous Region on the loess plateau during from 2003 to 2005, in which three kinds of crops including spring wheat, potato and millet were rotated in the form of combination on the 10-year-old degraded alfalfa grassland. The purposes are to study and compare the soil moisture restoration conditions and crop production effectiveness between different rotations, thus approach more reasonable alfalfa rotation patterns. The results showed that, rotation in 0-60 cm soil layer was wlnerable to the impact of precipitation and surface evaporation, moisture in 60-120 cm soil was mainly consumed by rotation crops, while moisture in 120-200 cm was stable relatively and rarely influenced by precipitation and surface evaporation and there was a trend of continuous restoration in it with the increasing of rotation year. The moisture in 120-200 cm soil could be improved by alfalfa-crop rotation. And it was significantly higher than that of abandoned land and grassland (CK), and could obtain certain crop yields meanwhile. Compared with other alfalfa-crop rotation pattems, potato- potato- wheat rotation pattem (PPW) has better restoration role on grassland moisture and ability to make use of limited precipitation. Total yields and water use efficiency (WUE) of rotation crops with PPW pattem were both relatively higher than others, i.e., 5214.5 kg/hm~2 and 9.38 kg/(hm~2·mm), respectively. Compared with alfalfa farmland before crop rotation the net moisture recovery amount of PPW rotation pattern was 24.73 mm in 120-200 cm soil layer.
中文关键词	旱区 ; 轮作 ; 土壤水分 ; 作物产量 ; 水分利用效率
英文关键词	arid regions rotation soil moisture crops yields water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3836434
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225399
作者单位	西北农林科技大学农学院, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	刘沛松,贾志宽,李军,等. 不同草粮轮作方式对退化苜蓿草地水分恢复的影响[J]. 西北农林科技大学,2010,26(2):95-102.
APA	刘沛松,贾志宽,李军,王俊鹏,&韩清芳.(2010).不同草粮轮作方式对退化苜蓿草地水分恢复的影响.农业工程学报,26(2),95-102.
MLA	刘沛松,et al."不同草粮轮作方式对退化苜蓿草地水分恢复的影响".农业工程学报 26.2(2010):95-102.