Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen

Zhao Qiu; Tian Xiuping; Zhou Liping; Dai Xuebin; Ning Xiaoguang; Zhang Xinjian

doi:10.13961/j.cnki.stbctb.2023.01.010

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Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen

- Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen
- Bulletin of Soiland Water Conservation Vol. 43, Issue 1, Pages: 78-83(2023)
- 作者机构：
  
  1. 天津市农业科学院,天津,300192
  2. 天津农学院农学与资源环境学院,天津,300384
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.01.010
  CLC： 512.1
- Published：2023
- 稿件说明：
移动端阅览
Zhao Qiu, Tian Xiuping, Zhou Liping, et al. Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 78-83.
DOI：

Zhao Qiu, Tian Xiuping, Zhou Liping, et al. Effect of Different Winter Green Manures on Composition and Mineralization of Soil Organic Nitrogen[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 78-83. DOI： 10.13961/j.cnki.stbctb.2023.01.010.

摘要

[目的

]

研究不同冬绿肥种植与翻压对土壤氮素供应能力的影响，为改进华北地区冬绿肥种植技术，提高作物产量和维持土壤生产力提供理论依据。[方法

]

在天津市武清区设置大田冬绿肥/玉米轮作定位试验(2012—2019年)种植和翻压冬绿肥，测定不同冬绿肥及组合处理即二月兰、毛叶苕子、黑麦、黑麦草、毛叶苕子与二月兰混播和毛叶苕子与黑麦混播土壤有机氮及组分含量；同时进行室内培养试验，测试不同处理土壤的有机氮矿化势(N

)和矿化量，分析冬绿肥种植与翻压对土壤有机氮组分及矿化的影响(以冬闲处理为对照)。[结果

]

与对照相比，冬绿肥种植与翻压显著提高总有机氮含量(幅度为3.05%～12.36%)，显著降低非酸解态有机氮含量(18.87～55.87 mg/kg)。冬绿肥处理N

值在189.15～245.90 mg/kg之间，比冬闲对照增加14.16%～48.41%，土壤矿化半衰期t

1/2

比冬闲对照提高22.57%～73.11%。所有处理室内培养24周矿化分解土壤有机氮主要组分为酸解总氮，冬绿肥处理土壤酸解总氮矿化量比对照高3.41～20.54 mg/kg，矿化率比对照增加7.96%～47.31%，差异显著。[结论

]

冬绿肥种植与翻压可显著增加土壤有机氮及其易矿化组分储量，提高土壤可矿化氮量，延长矿化周期，促进土壤氮库更新，提高土壤氮素供应能力。

Abstract

[Objective] The effects of different planting and overturning of winter green fertilizer on soil nitrogen supply capacity were studied in order to provide theoretical basis for improving planting technology of winter green fertilizer

increasing crop yield and maintaining soil productivity in North China. [Methods] A field experiment with a winter green manure-maize rotation was conducted at Wuqing District

Tianjin City from 2012 to 2019. The study also included indoor incubation experiments. The treatments included winter fallow

february orchid

vetch

rye

ryegrass

mixed vetch and february orchid

and mixed vetch and rye. Soil organic nitrogen content and its composition

soil organic nitrogen mineralization potential (N0)

and mineralization amount were measured. The effects of winter green manure planting and incorporation on soil organic nitrogen composition and mineralization were analyzed with winter fallow used as the control. [Results] Compared with winter fallow

winter green manure significantly increased total organic nitrogen and acid hydrolysable organic nitrogen by 3.05%—12.36%. However

winter green manure significantly decreased the content of non-acid-decomposed organic nitrogen by 18.87—55.87 mg/kg. N0 was 189.15—245.90 mg/kg in the treatments with winter green manure (14.16%—48.41% greater than the control)

and

half-life was increased by 22.57%—73.11%. After 24 weeks of indoor culture

soil organic nitrogen for all treatments was mainly composed of acid hydrolysable organic nitrogen. The mineralization amount of acid hydrolyzed total nitrogen was 3.41—20.54 mg/kg greater in the winter green manure treatments than that in the control

and the mineralization rate was 7.96%—47.31% higher than that in the control

with significant differences. [Conclusion] Winter green manure planting and incorporation significantly increased soil organic nitrogen storage and mineralizable nitrogen content

and prolonged the mineralization cycle

thereby promoting the renewal of the soil nitrogen pool

and improving soil nitrogen availability.

关键词

Keywords

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