干旱区生态环境知识资源中心(Arid): 干旱区植物根际土壤养分状况的对比研究

Arid

	干旱区植物根际土壤养分状况的对比研究
其他题名	Nutrition in the thizosphere of five xerophytic plants
	李从娟 1; 李彦1 ; 马健 1; 范连连 1; 王吉利 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:2 页码:222-228
中文摘要	利用根袋模拟实验方法,研究了古尔班通古特沙漠南缘5种常见植物梭梭(Haloxylon ammodendron)、白梭梭(HaloxcYlon persicum)、刺沙蓬(Salsola ruathenica)、骆驼蓬(Peganum harmala)和骆驼刺(Alhagi sparsifolio)的根际和非根际土壤的pH值及养分含量状况.结果表明:干旱区五种植物均可以通过根系调节降低根际土壤pH,且梭梭根际和非根际的pH值差异显著.有机质含量除梭梭和白梭梭外均在根际显著聚集,其根际聚集率分别为刺沙蓬110.27%,骆驼蓬113.08%,骆驼刺为126.73%.全氮含量在刺沙蓬和骆驼蓬的根际中亏缺显著,亏缺率分别达24.54%和 18.75%,而在骆驼刺根际中却显著聚集,聚集率为120.43%.有效氮在根际和非根际中的含量与全氮相反,刺沙蓬和骆驼蓬根际中聚集率分别为178.16%和151.76%,而在骆驼刺根际中亏缺率为45.79%.全磷含量和全钾含量在根际和给根际间均无显著差异.有效磷含量在刺沙蓬和骆驼蓬根际中出现了显著亏缺.速效钾含量在梭梭根际中表现为亏缺,在骆驼刺中表现为富集,而在其余3种植物中差异不显著.总之,5种干旱区植物均表现出不同程度的根际效应,对降低根际土的 pH值、提高根际有机质含量有积极作用,对5种不同生活型植物的对比表明梭梭和白梭梭两种荒漠灌木在1 a的盆栽实验中,其根际效应没有草本植物根际效应大
英文摘要	Rhizosphere is commonly regarded as the volume of a thin layer of soil immediately surrounding the plant roots. Due to the microbe populations’interactions and the root activities in this region, the thizosphere soil usually distinguishes significantly from the "bulk" soil, which is not influenced directly by living roots. To determine the magnitude of thizosphere effect on different plants in arid region,a thizobag experiment on five xeroph ytic plants of Haloxylon ammodendron, Haloxylon.persicum, Salsola ruathenica, Peganum harmala and. Alhagi sparsifolia was carried out to investigate the difference of soil pH and nutrient content in thizosphere and bulk soil at the south edge of Gurbantunggut Desert. The results show that pH values in thizosphere of five xerophytic plants were lower than those in bulk soil, and it differentiated significantly between the thizosphere and bulk soil for H.ammodendron.organic matter content in thizosphere was higher than those in bulk soil of five xerophytic plants, especially for the three grass plants of S.ruathenica,P.harmala and A.sparsifolia, and the accumulation ratios for them were 110. 27%,113.08% and 126.73% respectively. Total N content in the thizosphere of S.ruathenica and P.harmala was smaller than in bulk soil, ancl the deficient ratios were 24.54% and 18.75% respectively, while total N was richly accumulated in the thizosphere of A.sparsifolia, and its accumulated ratio reached 120.43% compared to bulk soil. Available N content in thizosphere and bulk soil presented a opposite pattern with total N, accumulated in thizosphere of S.ruathenica and P.harmala, and depleted in A.sparsifolia’s thizosphere. For total P and total K, there were no significant differences between the thizosphere and bulk soil. Available P was also depleted in thizosphere of S.ruathenica and P.harmala. While available K depleted in the thizosphere of H.ammodendron, and accumulated in the thizosphere of A.sparsifolia. All results documented five xerophytic plants presented different extent of thizosphere effects actually, and exerted positive action in reducing thizosphere pH and increasing organic matter in thizoshere, which exerts great action on the restoration of soil resources in arid region. Besides, due to different life form, the thizosphere effects of H.ammodendron and H.persicum in this experiment was smaller than that of other grass plants
中文关键词	根际效应 ; pH值 ; 土壤养分 ; 干旱区
英文关键词	Rhizosphere effect pH soil nutrition arid region
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:4183728
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226446
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.新疆生产建设兵团222团农4队, 阜康, 新疆 831505, 中国
推荐引用方式 GB/T 7714	李从娟,李彦,马健,等. 干旱区植物根际土壤养分状况的对比研究[J]. 中国科学院新疆生态与地理研究所,2011,34(2):222-228.
APA	李从娟,李彦,马健,范连连,&王吉利.(2011).干旱区植物根际土壤养分状况的对比研究.干旱区地理,34(2),222-228.
MLA	李从娟,et al."干旱区植物根际土壤养分状况的对比研究".干旱区地理 34.2(2011):222-228.