干旱区生态环境知识资源中心(Arid): 苜蓿叶片碳同位素分辨率与水分利用效率的关系

Arid

	苜蓿叶片碳同位素分辨率与水分利用效率的关系
其他题名	Relationship between Discrimination of Carbon Isotope in Leaf and Water Use Efficiency of Medicago sativa L
	朱林 1; 高雪 1; 张会丽 2; 许兴 1
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2018
卷号	40 期号:1 页码:17-23
中文摘要	在宁夏中部荒漠草原区设置三种水分处理,种植了10个遗传背景不同的紫花苜蓿(Medicago sativa L.)品种,分析了不同组分Delta~(13)C与蒸腾蒸发量(ET)、水分利用效率(WUE)和产量的关系.结果表明:随着灌水量的增加,苜蓿不同茬次干草产量、ET、叶片Delta~(13)C、叶片可溶糖Delta~(13)C和第一、第三茬WUE显著增加,但第二茬WUE降低.叶片Delta~(13)C在第一茬低水条件下(T1)与ET显著负相关,在第二茬T1和中水(T2)条件下与WUE显著正相关、在第二茬T1条件和第三茬高水(T3)条件下均与产量显著正相关.叶片可溶糖Delta~(13)C在第二茬T1条件下与ET呈显著负相关、与WUE显著正相关,在第三茬T3条件下与ET和WUE显著正相关,在第一、第三茬T3条件下与产量显著正相关.在全年尺度(三个茬次)上,叶片Delta~(13)C在三种水分处理下均与WUE显著正相关(P<0.01),叶片可溶糖Delta~(13)C仅在T1和T2条件下与WUE显著正相关(P<0.05).综合分析认为:在宁夏荒漠草原有灌溉条件(200~ 990mm)下选择高叶片Delta~(13)C的苜蓿基因型有利于提高长期水平的WUE.
英文摘要	Ten Medicago sativa L. genotypes with different genetic background were planted in Ningxia central desert steppe with three water treatments. The relationship between Delta~(13)C of different fractions and ET, WUE and yield was analyzed. The results showed that yield, ET, leaf Delta~(13)C (Delta_L) and leaf soluble carbohydrate Delta~(13)C (Delta_(WSC)) increased significantly when irrigated water increased. Enhanced irrigation amounts increased WUE during the first and third cuttings and decreased WUE during the second cutting. Delta_L was related negatively with ET in the least irrigation treatment (T1) during the first cutting, and correlated positively with WUE in T1 and intermediate irrigation treatment (T2) during the second cutting. There were positive correlations between Delta_L and yield in T1 during the second cutting and in T3 during the third cutting. Delta_(WSC) was correlated negatively with ET and positively with WUE in T1 during the second cutting, and was related positively with ET and WUE in T3 during the third cutting. There were significant and positive correlations between Delta_(WSC) and yield in T3 during the first and third cuttings. When the data of three cuttings were pooled together, Delta_L was correlated with WUE significantly and positively (P<0.01) under all the water treatments, while Delta_(WSC) was only related with WUE positively and significantly in T1 and T2 (P<0.05).To sum up, in Ningxia desert steppe with irrigation from 200 mm to 900 mm, selection of Medicago sativa L. genotypes with high leaf Delta~(13)C would improve long term WUE.
中文关键词	苜蓿 ; 碳同位素分辨率 ; 宁夏中部荒漠草原 ; 水分利用效率
英文关键词	Medicago sativa L. Carbon isotope discrimination Ningxia central desert steppe Water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6163786
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238653
作者单位	1.宁夏大学;;宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川;;银川, 宁夏;;宁夏 750021;;750021, 中国; 2.宁夏大学农学院, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	朱林,高雪,张会丽,等. 苜蓿叶片碳同位素分辨率与水分利用效率的关系[J]. 宁夏大学,2018,40(1):17-23.
APA	朱林,高雪,张会丽,&许兴.(2018).苜蓿叶片碳同位素分辨率与水分利用效率的关系.中国草地学报,40(1),17-23.
MLA	朱林,et al."苜蓿叶片碳同位素分辨率与水分利用效率的关系".中国草地学报 40.1(2018):17-23.