Effects of No-till and Stubble Retention on Phosphorus Fractions of Heilu Soil

WANG Yuping; ZHENG Lina; SHEN Yuying

doi:10.13961/j.cnki.stbctb.20151014.002

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Effects of No-till and Stubble Retention on Phosphorus Fractions of Heilu Soil

- Effects of No-till and Stubble Retention on Phosphorus Fractions of Heilu Soil
- Bulletin of Soiland Water Conservation Vol. 35, Issue 5, Pages: 149-154(2015)
- 作者机构：
  
  兰州大学草地农业科技学院, 草地农业生态系统国家重点实验室,甘肃,兰州,730020
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.20151014.002
  CLC：
- Published：2015
- 稿件说明：
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WANG Yuping, ZHENG Lina, SHEN Yuying. Effects of No-till and Stubble Retention on Phosphorus Fractions of Heilu Soil[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 149-154.
DOI：

WANG Yuping, ZHENG Lina, SHEN Yuying. Effects of No-till and Stubble Retention on Phosphorus Fractions of Heilu Soil[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 149-154. DOI： 10.13961/j.cnki.stbctb.20151014.002.

摘要

[目的

]

探究免耕及添加秸秆条件下黑垆土土壤磷组分特征及其与AM真菌侵染的关系

了解雨养农业区农业系统磷素利用效率。[方法

]

在陇东黄土高原黑垆土区域

测定传统耕作、传统耕作+秸秆覆盖、免耕和免耕+秸秆覆盖4种处理小麦-玉米-大豆轮作系统中玉米阶段土壤全磷、速效磷组分及AM真菌菌根侵染率。[结果

]

水土保持耕作处理实施9 a后

免耕和秸秆覆盖处理下0-5 cm土壤磷素含量显著提高

活性磷组分H

O-P

NaHCO

-P

NaOH-P

分别比对照提高84.6%

85.2%和56.6%;活性无机磷(H

O-P

NaHCO

-P

之和)和潜在活性磷(NaOH-P

)分别占总无机磷的11.4%和4.5%

全磷含量与磷组分、速效磷与磷组分呈显著正相关

2个免耕处理菌根侵染率分别比对照增加20.8%和16.5%。[结论

]

免耕和秸秆覆盖显著提高了土壤磷含量

免耕对AM真菌菌根侵染率有积极影响。

Abstract

[Objective] The objectives of the study are to investigate the characteristics of soil phosphorus fractions on Heilu soil and its relationships with AM fungi colonization under no-till and stubble retention

in order to understand the phosphate use efficiency in rain feed agricultural system.[Methods] Total phosphorus

available phosphorus and phosphorus fraction and arbuscular mycorrhizal(AM) fungi colonization were determined using classical methods for maize crop under 4 tillage managements:conventional tillage

tillage +stubble retention

no-till

no-till +stubble retention in the Loess Plateau.[Results] After nine-year conservation tillage implementation

the content of P in soil layer of 0-5 cm increased. Compared to conventional tillage

the fraction of H2O-P

NaHCO3-Pi and NaOH-Pi was increased by 84.6%

85.2% and 56.6%

respectively

under conservation tillage. Labile phosphorus(H2O-Pi

NaHCO3-Pi) and potential labile phosphorus(NaOH-Pi) accounted for 11.4% and 4.5% of total inorganic phosphorus. The total phosphorus showed a significantly positive correlation with available phosphorus and phosphorus fraction. Compared to conventional tillage

the AM fungi colonization increased by 20.8% and 16.5% under no-till manage ment.[Conclusion] The content of soil phosphorus was significantly improved under no-till and stubble retention

and the AM fungi colonization had a positive response to no-till.

关键词

Keywords

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