干旱区生态环境知识资源中心(Arid): 荒漠河岸林胡杨养分状况研究

Arid

	荒漠河岸林胡杨养分状况研究
其他题名	Status of Foliar Nutrients inPopulus euphratica Desert Riparian Forest in Northwestern China
	曹生奎 1; 冯起2 ; 司建华2 ; 张秀风 3; 刘蔚 2; 常宗强 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2011
卷号	31 期号:5 页码:1131-1140
中文摘要	对荒漠河岸林胡杨叶片有机碳(C)、全氮(N)、全磷(P)和全钾(K)等化学组分在生长季不同月份和不同微生境间的变化以及它们彼此间的相关性进行了研究。结果表明,胡杨叶片C,N,P和K的变化范围分别为 39.08%~46.16%,0.28%~2.81%,0.05%~0.18%和0.35%~2.03%,平均值依次为43.51%,1.49%,0.102%和1.17%。叶片C/N,C/P和N/P的变化范围分别为16.26~146.61,258.08~908.67和2.89~26.67,平均值依次是37.24,466.27和15.14。叶片平均N含量显著低于全国落叶树平均N含量,P含量与全国落叶树的平均P含量较为接近。胡杨叶片C/N明显高于全球陆生植物的C/N比值;N/P比值说明胡杨生长受到氮和磷元素的共同限制。在生长季,胡杨叶片C、N、P和K含量总体表现为下降趋势,最高值出现在5月,最低值出现在9月;微生境间,C,N,K含量和N/P比值从河岸低地,河岸平地,河岸沙堆,戈壁到沙丘间逐渐升高;C/N趋势恰好相反,P含量没有太明显的变化。叶片C含量与N、K含量均呈极显著正相关,与P含量呈弱正相关,N-K和P-K均呈显著正相关。
英文摘要	Contents of chemical constituents,namely organic carbon(C),total nitrogen (N),total phosphorus (P),total potassium (K),of Populus euphratica desert riparian forest in Ejina oasis of northwestern China were compared among different months in growing season and different micro-habitats,and the correlations among the chemical constituents were studied. Results showed that the ranges of C,N,P,and K contents in the leaves of P. euphratica were 39. 08% -46. 16%,0. 28%~2. 81%,0. 05%--0. 18%,and 0. 35% 2. 03%,and the mean values were 43.51%,1.49%,0. 102% and 1.17%,respectively. The ratios of C/N,C/P and N/P varied from 16. 26 to 146. 61,from 258.08 to 908. 67,and from 2. 89 to 26. 67,respectively,and the mean values were 37. 24,466. 27 and 15. 14,respectively. The mean N content in the leaves of P. euphratica was significantly lower than N content in deciduous tree in China,but their mean P contents were similar. The ratio of C/N in the leaves of P. euphratica was remarkably higher than that of terrestrial plants. The ratio of N/P indicated that growth of P. euphratica was jointly limited by N and P nutrimental deficiency. The total content of leaf C,N,P,and K descended during growth season,and the maximum value appeared in May,the minimum appeared in September. The contents of C,N and K,and the ratio of N/P gradually increased from riparian lowland,flatland,sandpile,Gobi to dune,but the spatial pattern of C/N was opposite,and there was not significant spatial variation for P content. There were extremely significantly positive correlations between C content and N,K contents,respectively,and weakly positive correlation between C content and P content. The relationships of N and P with K were both significantly positive.
中文关键词	养分 ; 胡杨 ; 荒漠河岸林 ; 极端干旱区
英文关键词	nutrient Populus euphratica desert riparian forest extreme arid region
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4311319
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227546
作者单位	1.青海师范大学生命与地理科学学院, 西宁, 青海 810008, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 3.阿拉善右旗雅布赖治沙站, 巴彦浩特, 内蒙古 737300, 中国
推荐引用方式 GB/T 7714	曹生奎,冯起,司建华,等. 荒漠河岸林胡杨养分状况研究[J]. 中国科学院西北生态环境资源研究院,2011,31(5):1131-1140.
APA	曹生奎,冯起,司建华,张秀风,刘蔚,&常宗强.(2011).荒漠河岸林胡杨养分状况研究.中国沙漠,31(5),1131-1140.
MLA	曹生奎,et al."荒漠河岸林胡杨养分状况研究".中国沙漠 31.5(2011):1131-1140.