[1]宋日,刘利,马丽艳,等.作物根系分泌物对土壤团聚体大小及其稳定性的影响[J].南京农业大学学报,2009,32(3):93-97.[doi:10.7685/j.issn.1000-2030.2009.03.017]
 SONG Ri,LIU Li,MA Li-yan,et al.Effect of crop root exudates on the size and stability of soil aggregate[J].Journal of Nanjing Agricultural University,2009,32(3):93-97.[doi:10.7685/j.issn.1000-2030.2009.03.017]
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作物根系分泌物对土壤团聚体大小及其稳定性的影响()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
32卷
期数:
2009年3期
页码:
93-97
栏目:
出版日期:
2009-08-30

文章信息/Info

Title:
Effect of crop root exudates on the size and stability of soil aggregate
作者:
宋日刘利马丽艳吴春胜
吉林农业大学农学院,吉林,长春,130118
Author(s):
SONG Ri LIU Li MA Li-yan WU Chun-sheng
College of Agronomy, Jilin Agricultural University, Changchun 130118, China
关键词:
玉米 大豆 根系分泌物 土壤团聚体
Keywords:
corn(Zea mays L.) soybean(Glycine max(L.)Merr.) root exudates soil aggregate
分类号:
S152.4
DOI:
10.7685/j.issn.1000-2030.2009.03.017
文献标志码:
A
摘要:
采用土培试验将玉米和大豆植株根系分泌物添加到黑土中,25℃培养30 d,研究根系分泌物对土壤水稳性团聚体大小和稳定性的影响。研究结果表明,作物根系分泌物添加到土壤中,显著提高土壤有机碳矿化率、土壤水溶性糖和多糖含量及水稳性大团聚体(>1 mm)比例(P<0.05),显著提高水稳性团聚体稳定性(P<0.05)。玉米和大豆根系分泌物对土壤结构特性影响趋势基本一致,玉米根系分泌物提高土壤稳定性的幅度显著高于大豆根系分泌物。培养1 d时,添加玉米和大豆根系分泌物的土壤水稳性团聚体比例分别比对照增加2.38倍和1.71倍;培养30 d时,添加玉米和大豆根系分泌物的水稳性团聚体含量分别比对照增加52.0%和28.4%。因此,新鲜的作物根系分泌物能快速黏结土壤颗粒,避免遭水破坏,保护团聚体,从而提高团聚体稳定性。
Abstract:
The soil structural properties after addition of crop root exudates to the soil was studied through a soil culture experiment. Root exudates were collected from soybean(Glycine max(L. )Merr. )and corn(Zea mays L. )plants. Exudates were added to black soil which was incubated for 30 days at the temperature of 25 ℃. The effect of soybean and corn root exudates on soil aggregate size and its stability were conducted. The results showed that addition of crop root exudates to black soil increased significantly the mineralization of soil organic C, the content of soil water-soluble sugar and polysaccharide, and the proportion of biggest soil aggregate(>1 mm)(P<0.05), and resulted in a significant increase in soil aggregate stability(P<0.05). The patterns of the changes of soil structure were very similar for additions of corn and soybean root exudates while the magnitude of the change in improving soil structural stability for the addition of corn root exudates was larger than that in the addition of soybean root exudates. Compared with the control, the proportion of water stable aggregates of soybean root exudates 1 d after the incubation was multiplied by 2.38 and 1.71, respectively, and the proportion of water stable aggregates of soybean root exudates 30 d after the incubation was multiplied by 52.0% and 28.4%, respectively. Therefore, the research suggests that freshly released exudates are able to stick very rapidly to soil particles and protect aggregates against water destruction, so it can enhance soil aggregate stability.

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备注/Memo

备注/Memo:
国家自然科学基金资助项目(30871487);国家丰粮工程项目(30375647);玉米节本增效技术研究项目(472891)
更新日期/Last Update: 2009-08-30