Effects of Plastic Film Mulching on Soil Carbon and Nitrogen Fractions in a Dryland Spring Maize Field on the Loess Plateau

FU Xin; WANG Jun; ZHAO Dandan

doi:10.13870/j.cnki.stbcxb.2017.03.040

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Effects of Plastic Film Mulching on Soil Carbon and Nitrogen Fractions in a Dryland Spring Maize Field on the Loess Plateau

更新时间：2025-03-12

- Effects of Plastic Film Mulching on Soil Carbon and Nitrogen Fractions in a Dryland Spring Maize Field on the Loess Plateau
- Vol. 31, Issue 3, Pages: 239-243(2017)
- 作者机构：
  
  西北大学城市与环境学院,西安,710127
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.03.040
  CLC： S153.6
- Published：2017
- 稿件说明：
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FU Xin, WANG Jun, ZHAO Dandan. Effects of Plastic Film Mulching on Soil Carbon and Nitrogen Fractions in a Dryland Spring Maize Field on the Loess Plateau[J]. 2017, 31(3): 239-243.
DOI：

FU Xin, WANG Jun, ZHAO Dandan. Effects of Plastic Film Mulching on Soil Carbon and Nitrogen Fractions in a Dryland Spring Maize Field on the Loess Plateau[J]. 2017, 31(3): 239-243. DOI： 10.13870/j.cnki.stbcxb.2017.03.040.

摘要

基于2 a田间试验，研究了地膜覆盖对旱作春玉米田土壤有机碳、全氮及其组分的影响，试验包括地膜覆盖玉米田、无覆盖玉米田和裸地休闲3个处理，分层测定了0—40 cm土层有机碳、全氮、颗粒有机碳氮、潜在矿化碳氮和微生物量碳氮含量。结果表明：在0—40 cm土层，各处理间土壤有机碳和全氮含量均无显著差异。与不覆盖相比，地膜覆盖处理0—40 cm土层颗粒有机碳氮及其所占比例分别降低了29.0%，33.3%，29.9%，35.7%；0—10 cm土层潜在矿化碳及其所占比例分别降低了17.8%和16.1%，潜在可矿化氮和微生物量氮及其所占比例无显著差异，但在0—10 cm土层地膜覆盖微生物量氮含量及其所占比例分别较不覆盖处理提高了10.6%和10.5%（p<0.05）。与裸地休闲相比，无覆盖处理0—40 cm土层潜在可矿化碳氮分别提高了12.8%和14.7%，地膜覆盖处理则分别提高了7.8%和6.5%（p<0.05），但种植玉米降低了微生物量碳氮含量及其所占比例，但覆盖与否对潜在可矿化碳氮和微生物量碳氮影响不显著。总体来看，地膜覆盖能够在一定程度上提高表土微生物量碳氮组分及其所占比例，但显著降低了中活性碳氮组分含量及其比例，不利于长期的土壤碳氮固定。

Abstract

The effects of plastic film mulching on soil organic carbon and nitrogen fractions were investigated in a spring maize field. Three treatments

i.e. plastic film mulching

no mulching

and bareland fallow were included and soil organic carbon (SOC)

total nitrogen (STN)

particulate organic carbon and nitrogen (POC

PON)

potential mineralized carbon and nitrogen (PCM

PNM)

and microbial biomass carbon and nitrogen (MBC

MBN) were measured at 0-40 cm soil depth. No significant differences in SOC and STN were found among treatments for all soil depths. Compared with no mulching

the contents of POC

PON

POC/SOC

and PON/STN at 0-40 cm soil depth was decreased by 29.0%

33.3%

29.9%

and 35.7% by plastic film mulching

respectively. The PCM content and PCM/SOC was decreased by 17.8% and 16.1%

respectively

and the MBN content and MBN/STN at 0-10 cm soil depth was increased by 10.6% and 10.5% (p < 0.05)

respectively. Compared with the bareland fallow

the content of PCM and PNM at 0-40 cm soil depth was increased by 12.8% and 14.7 by no mulching

respectively

and was increased by 7.8% and 6.5% (p < 0.05) by plastic film mulching

respectively. The contents of MBC and MBN and their contributions decreased after maize planting in spite of plastic film mulching or not. In general

plastic film mulching could increase microbial biomass carbon and nitrogen at the top layers but decrease both the contents and conributions of moderate labile fractions

indicating that plastic film mulching may not be beneficial for long-term soil carbon and nitrogen sequestration in dryland maize fields.

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Related Institution

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling

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