Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil

CHEN Lisha; ZHANG Jinchi; LU Qian; ZHUO Weijun; LI Meihua; LI Shichang

doi:10.11833/j.issn.2095-0756.2015.02.014

Volume 32 Issue 2

Mar. 2015

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CHEN Lisha, ZHANG Jinchi, LU Qian, ZHUO Weijun, LI Meihua, LI Shichang. Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil[J]. Journal of Zhejiang A&F University, 2015, 32(2): 264-271. doi: 10.11833/j.issn.2095-0756.2015.02.014

Citation:

CHEN Lisha, ZHANG Jinchi, LU Qian, ZHUO Weijun, LI Meihua, LI Shichang. Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil[J]. Journal of Zhejiang A&F University, 2015, 32(2): 264-271. doi: 10.11833/j.issn.2095-0756.2015.02.014

Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil

doi: 10.11833/j.issn.2095-0756.2015.02.014

1.
College of Forest, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;
2.
Nanjing Water Planning and Designing Institute Co. Ltd, Nanjing 210006, Jiangsu, China;

Received Date: 2014-03-25
Rev Recd Date: 2014-05-20
Publish Date: 2015-04-20

Abstract

To explore the allelochemical activity of poplar root exudates and to provide a basis for constructing reasonable agroforestry systems, aqueous extracts of different successive poplar rhizosphere soils were diluted to different concentrations（100, 150, 200, 500, 800, 1 000 gL-1） for application on seeds and seedlings of lettuce, wheat, and corn with three replication every treatment. The study was conducted on continuous cropping in a poplar plantation in Da Shahe Forest Farm in Fengxian County, Xuzhou City, Jiangsu Province. Results showed that when the aqueous extract of polar rhizosphere soil was at a low concentration, lettuce and wheat seed germination and seedling growth were promoted. With increasing concentration promotion decreased, and when a critical concentration was exceeded growth was inhibited. The inhibition further increased with increasing concentrations. For corn seed germination and seedlings the aqueous extract always inhibited growth. Above the critical concentration, germination rates gradually decreased with succeeding generations as did shoot and root length; whereas below the critical concentration they gradually increased. For both lettuce shoots and lettuce roots, negative allelopathic effects gradually increased with each generation. Comprehensive allelopathic effects of poplar root exudates on crop growth increased with each generation. The difference values between the highest and the lowest comprehensive allelopathic effect was 3.384 3－3.808 8. ［Ch, 2 fig. 3 tab. 30 ref.］
- agoforestry ecosystem,
- poplar,
- continuous cropping,
- rhizosphere,
- aqueous extract,
- allelopathic effect

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil

1. College of Forest, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;

2. Nanjing Water Planning and Designing Institute Co. Ltd, Nanjing 210006, Jiangsu, China;

Received Date: 2014-03-25

Rev Recd Date: 2014-05-20

Publish Date: 2015-04-20

Key words:

Abstract: To explore the allelochemical activity of poplar root exudates and to provide a basis for constructing reasonable agroforestry systems, aqueous extracts of different successive poplar rhizosphere soils were diluted to different concentrations（100, 150, 200, 500, 800, 1 000 gL-1） for application on seeds and seedlings of lettuce, wheat, and corn with three replication every treatment. The study was conducted on continuous cropping in a poplar plantation in Da Shahe Forest Farm in Fengxian County, Xuzhou City, Jiangsu Province. Results showed that when the aqueous extract of polar rhizosphere soil was at a low concentration, lettuce and wheat seed germination and seedling growth were promoted. With increasing concentration promotion decreased, and when a critical concentration was exceeded growth was inhibited. The inhibition further increased with increasing concentrations. For corn seed germination and seedlings the aqueous extract always inhibited growth. Above the critical concentration, germination rates gradually decreased with succeeding generations as did shoot and root length; whereas below the critical concentration they gradually increased. For both lettuce shoots and lettuce roots, negative allelopathic effects gradually increased with each generation. Comprehensive allelopathic effects of poplar root exudates on crop growth increased with each generation. The difference values between the highest and the lowest comprehensive allelopathic effect was 3.384 3－3.808 8. ［Ch, 2 fig. 3 tab. 30 ref.］

Allelopathy of aqueous extracts when intercropping in poplar rhizosphere soil

doi: 10.11833/j.issn.2095-0756.2015.02.014

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views