Effects of Green Manure on Soil Phosphorus Fractions and Availability in Orchard

ZHANG Jianwei; SHI Xiaojun; XU Wenjing; ZHANG Xueliang; LIU Rui; WEI Yong; ZHAO Qiu; ZHANG Yuting

doi:10.13870/j.cnki.stbcxb.2021.06.045

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Effects of Green Manure on Soil Phosphorus Fractions and Availability in Orchard

更新时间：2025-03-12

- Effects of Green Manure on Soil Phosphorus Fractions and Availability in Orchard
- Vol. 35, Issue 6, Pages: 336-342(2021)
- 作者机构：
  
  1. 西南大学资源环境学院,重庆,400716
  2. 西南大学长江经济带农业绿色发展研究中心,重庆,400716
  3. 天津市农业科学院,天津,300192
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.06.045
  CLC： S142
- Published：2021
- 稿件说明：
移动端阅览
ZHANG Jianwei, SHI Xiaojun, XU Wenjing, et al. Effects of Green Manure on Soil Phosphorus Fractions and Availability in Orchard[J]. 2021, 35(6): 336-342.
DOI：

ZHANG Jianwei, SHI Xiaojun, XU Wenjing, et al. Effects of Green Manure on Soil Phosphorus Fractions and Availability in Orchard[J]. 2021, 35(6): 336-342. DOI： 10.13870/j.cnki.stbcxb.2021.06.045.

摘要

以天津市桃园土壤为研究对象，采用Tiessen磷分级方法研究绿肥栽培并利用条件下土壤磷组分含量变化和磷素活化周转特征。试验共设3个处理：绿肥覆盖（SC）、翻压（BU）和清耕对照（CT）处理。分别于绿肥处理1，4，7年后采集0—20，20—40 cm的土壤样品，测定全磷、活性磷库（Resin—Pi和NaHCO3—P）、中稳性磷库（NaOH—P）和稳定态磷库（Dil.HCl—Pi、Conc.HCl—P和Residual—P）含量。结果表明，与CT处理相比，SC和BU处理在各采样年份均提高了土壤全磷、Resin—Pi、NaHCO3—P、NaOH—P和Residual—P含量，降低Dil.HCl—Pi和Conc.HCl—P含量，处理间差异性随绿肥利用年限的增加而增加；其中，各指标BU处理均优于SC处理，且0—20 cm土层变化最为明显。绿肥利用7年后，BU处理0—20 cm土壤Resin—Pi、NaHCO3—P、NaOH—P和Residual—P含量较CT处理分别显著增加48.82%~128.41%，145.93%~231.16%，206.26%~590.06%和34.67%~37.66%，Dil.HCl—Pi和Conc.HCl—P含量分别显著降低12.37%~15.79%和43.72%~91.39%。综上，相对于清耕对照处理，果园绿肥栽培并利用可显著增加土壤活性磷库和中稳性磷库的比例，并显著降低稳定态磷库的比例；同时，随着绿肥利用年限的增加，土壤活性磷库和中稳性磷库的比例随之增加，稳定态磷库的比例随之降低。研究结果表明，果园绿肥栽培并利用可以有效促进土壤难溶性磷的活化周转，提高土壤磷素生物有效性。

Abstract

Taking peach orchard as the research object

the effect of green manure on soil phosphorus fractions and phosphorus turnover characteristics were investigated by Tiessen’s phosphorus fractionation method. There were three treatments

including green manure utilization as surface cover (SC)

buried underground (BU) and clean tillage control (CT). Soil samples from 0—20 and 20—40 cm were collected after green manure utilization for 1

and 7 years

to measure the content of total phosphorus

labile phosphorus pool (Resin-Pi and NaHCO3—P)

moderately stable phosphorus pool (NaOH—P) and stable phosphorus pool (Dil.HCl—Pi

Conc.HCl—P and Residual—P).The results showed that

compared with CT

SC and BU increased soil total phosphorus

Resin-Pi

NaHCO3—P

NaOH—P and Residual—P contents

and decreased Dil. HCl—Pi and Conc. HCl—P contents in each sampling year. These differences were more pronounced with the increase of green manure utilization time. And

the BU showed the higher phosphorus availability than SC and the green manure mainly affected 0—20 cm soil layer. After seven years of cultivation and utilization of green manure

compared with CT

the contents of Resin—Pi

NaHCO3—P

NaOH—P and Residual—P of BU were significantly increased by 48.82%~128.41%

145.93%~231.16%

206.26%~590.06% and 34.67%~37.66%

respectively

and the contents of Dil. HCl—Pi and Conc. HCl—P were significantly reduced by 12.37%~15.79% and 43.72%~91.39%

respectively. In summary

compared with CT

green manure utilization could significantly increase the proportion of soil labile and moderately stable phosphorus pool

and significantly decrease the proportion of stable phosphorus pool. Moreover

with the increasing green manure utilization years

the proportion of soil labile and moderately stable phosphorus pool also increased

while the proportion of stable phosphorus pool decreased. This study shows that the cultivation and utilization of green manure in orchards could effectively promote the mobilization and turnover of insoluble phosphorus and improve the bioavailability of soil phosphorus.

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Keywords

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