干旱区生态环境知识资源中心(Arid): 黄土高原半干旱偏旱区苜蓿-粮食轮作土壤水分恢复效应

Arid

	黄土高原半干旱偏旱区苜蓿-粮食轮作土壤水分恢复效应
其他题名	Effects of alfalfa-grain rotation on soil moisture restoration in semi-arid and drought-inclined areas of the Loess Plateau
	孙剑 1; 李军 2; 王美艳 1; 王学春 1; 方新宇 1; 任晶晶 1
ISSN	1002-6819
出版年	2009
卷号	25 期号:6 页码:33-39
中文摘要	该文测定和分析了黄土高原半干旱偏旱区不同生长年限苜蓿草地以及轮作不同年限粮食作物后0～1000 cm深层土壤水分变化规律.结果表明:随着苜蓿生长年限的延长,苜蓿草地土壤干层厚度逐渐增加,3年生苜蓿草地土壤干层深度达到760 cm,6、7、10年生苜蓿草地土壤干层深度均超过1000 cm,6年生苜蓿地1000～1500 cm土层仍为干燥层,土壤平均湿度为9.68%;采用草粮轮作能明显减小苜蓿草地干层的厚度和范围,0～1000 cm土壤水分较10年生苜蓿草地都有不同程度的恢复,轮作2、6、8、12和18 a粮田平均土壤水分恢复速率25.2 mm/a,年均累积恢复土层厚度123.1 cm,0～300 cm土层水分恢复程度较高,且轮作年限愈长,土壤水分恢复效果越好,轮作18 a粮食作物后0～660 cm土层土壤水分恢复量达到了531.1 mm;苜蓿草地适宜翻耕年限为5～6 a,且6年生苜蓿草地0～1000 cm土壤水分恢复到当地土壤稳定湿度值需要23.8 a,该地区适宜的苜蓿-粮食轮作模式为"5～6年生苜蓿24年粮食作物".
英文摘要	Soil moistures were measured and analyzed in 0-1000 cm layers on alfalfa grasslands with different growth years and alfalfa-grain crop rotations by different growth years, in semi-arid and drought-inclined areas of the Loess Plateau. The results showed that with the increasing alfalfa growth years, the thickness of dry soil layer of alfalfa grasslands deepened gradually. The dry layer soil depth of 3 years alfalfa field had reached 760 cm, that of 6, 7, 10 years alfalfa fields had been over 1000 cm, the soil layers of 1000-5000 cm of 6 years alfalfa field were still in drying layer, the average of soil moisture was 9.68%. Alfalfa-grain crop rotation could significantly reduce the thickness and distribution of dry soil layer. Comparing with 10 years old alfalfa field, the soil moisture in 0-1000 cm profile of rotated grain crop fields had recovered in some extent. The average rate of soil water resumption was 25.2 mm per year for 2, 6, 8, 12 and 18 years grain crop rotation fields, and annual accumulative resumption in 0-1000 cm soil layer was 123.1 cm. The soil recovery degree in 0-300 cm layers was better than that in deeper soil layers, and with the extension of the rotation period, the effect of soil water resumption could be much better, the water resumption amount in 0-660 cm had reached 531.1 mm for 18 years grain crop rotation field. The suitable year for alfalfa fields to begin grain rotation was 5 or 6 years, and years for soil moisture restored to the local soil stable moisture with grain crop rotation needed 23.8 years in 0-1000 cm profile of 6 years alfalfa field. In this region, reasonable alfalfa-grain crop rotation pattern was 5 or 6 years alfalfa and 24 years grain crop planting.
中文关键词	草粮轮作 ; 水分恢复 ; 半干旱偏旱区 ; 黄土高原 ; 紫花苜蓿(Medicago sativa) ; 土壤干燥化
英文关键词	alfalfa-grain crop rotation soil water restoration semi-arid prone to drought area loess plateau alfalfa (Medicago sativa) soil desiccation
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:3638359
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/2XILL650/223944
作者单位	1.西北农林科技大学农学院, 杨凌, 陕西 712100, 中国; 2.西北农林科技大学农学院, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	孙剑,李军,王美艳,等. 黄土高原半干旱偏旱区苜蓿-粮食轮作土壤水分恢复效应[J]. 西北农林科技大学,2009,25(6):33-39.
APA	孙剑,李军,王美艳,王学春,方新宇,&任晶晶.(2009).黄土高原半干旱偏旱区苜蓿-粮食轮作土壤水分恢复效应.,25(6),33-39.
MLA	孙剑,et al."黄土高原半干旱偏旱区苜蓿-粮食轮作土壤水分恢复效应".25.6(2009):33-39.