退耕地三倍体毛白杨林地细根生物量及其与土壤水稳性团聚体的关系

doi:10.11707/j.1001-7488.20070504

林业科学 ›› 2007, Vol. 43 ›› Issue (05): 24-29.doi: 10.11707/j.1001-7488.20070504

退耕地三倍体毛白杨林地细根生物量及其与土壤水稳性团聚体的关系

董慧霞^1,2 李贤伟¹ 张健¹ 范冰^1,3 范川¹

1.四川农业大学生态林业工程省级重点实验室,雅安625014；2.河南师范大学生命科学学院新乡453007；3.中国科学院沈阳应用生态研究所沈阳110016

收稿日期:2006-04-28 修回日期:1900-01-01 出版日期:2007-05-25 发布日期:2007-05-25

Biomass of Fine Root and Its Relationship with Water-Stable Aggregate in Compound Lands of Triploid Populus tomentosa on Lands Converted from Agricultural Lands

Dong Huixia^1,2,Li Xianwei¹,Zhang Jian¹,Fan Bing^1,3,Fan Chuan¹

1.State Key Laboratory of Ecological Forestry Engineering,Sichuan Agricultural University Ya'an 625014; 2.College of Life Sciences,Henan Normal University Xinxiang 453007; 3.Institute of Applied Ecology,Chinese Academy of Sciences Shenyang 110016

Received:2006-04-28 Revised:1900-01-01 Online:2007-05-25 Published:2007-05-25

摘要/Abstract

摘要：

以未退耕的陡坡耕地作对比,对退耕还林(草)4年后2种草本层模式的三倍体毛白杨林地进行≤1mm细根生物量及土壤水稳性团聚体(WSA)含量的研究。结果表明:2种林地的林木细根生物量均为上层>中层>下层,比值均约为50∶30∶20,黑麦草林地林木细根年平均生物量约为自然草林地的2倍;但就总细根量来说,自然单根系大于黑麦草根系,是黑麦草的4.4倍;林地的水稳性团聚体含量和未退耕地在总量上差别不大,但林地上层和中层大粒级的水稳性团聚体含量明显高于未退耕地;相关性分析结果表明,≤1mm细根能提高大粒级及水稳性团聚体含量及水稳性团聚体总量。

关键词: 细根, 草根, 生物量, 水稳性团聚体

Abstract:

Taking unconverted steep slope farmland as control site,a study on biomass of fine root and its relationship with water-stable aggregate in two herbaceous modes of four years triploid Populus tomentosa lands converted from agricultural lands were conducted.Results showed that the biomass of fine root(≤1 mm)in different layers are different as following descending sequence:upper layer,middle layer,lower layer,and at an approximately ratio as 50∶30∶20.Average biomass every year of fine roots in ryegrass were two times more than that of natural grass-forest compound lands;Total amount of natural grass root was 4.4 times than that of ryegrass mode.Water-stable aggregate of upper layer,middle layer,lower layer and unconverted lands represented no significant differences,whereas water-stable aggregate of big-particle in upper and middle layer were much higher than that of unconverted lands,water-stable aggregate of natural grass-forest lands were higher than that of managed grass-forest lands.Two-way analysis of variance indicated that fine root(≤1 mm)can enhance water-stable aggregate and total water-stable aggregate significantly.Consequently,project converting agricultural lands to forest-grass lands were effective on improving anti-erosion capability.

Key words: fine root, grass root, biomass, water-stable aggregate

董慧霞;李贤伟张健范冰;范川. 退耕地三倍体毛白杨林地细根生物量及其与土壤水稳性团聚体的关系[J]. 林业科学, 2007, 43(05): 24-29.

Dong Huixia;Li Xianwei;Zhang Jian;Fan Bing;Fan Chuan. Biomass of Fine Root and Its Relationship with Water-Stable Aggregate in Compound Lands of Triploid Populus tomentosa on Lands Converted from Agricultural Lands[J]. Scientia Silvae Sinicae, 2007, 43(05): 24-29.

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退耕地三倍体毛白杨林地细根生物量及其与土壤水稳性团聚体的关系

Biomass of Fine Root and Its Relationship with Water-Stable Aggregate in Compound Lands of Triploid Populus tomentosa on Lands Converted from Agricultural Lands

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