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免耕对玉米生产力的影响:基于全球荟萃分析
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引用本文:卢志强,温思佳,李雨泽,李国瑞,温晓霞.免耕对玉米生产力的影响:基于全球荟萃分析[J].西北农业学报,2024,(3):452~468
DOI:10.7606/j.issn.1004-1389.2024.03.008
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作者单位
卢志强,温思佳,李雨泽,李国瑞,温晓霞 (西北农林科技大学 农学院陕西杨凌 712100) 
基金项目:国家重点基础研究发展计划(2021YFD1901102-6)。
中文摘要:通过对196篇相关文献的1 043对数据进行全球荟萃分析,评估免耕条件下玉米籽粒产量、秸秆生物量和叶面积指数的变化,并探讨气候、土壤、管理因素对其影响程度和方向。结果表明,相较于传统翻耕,免耕总体上显著降低了玉米籽粒产量、秸秆产量和叶面积指数5.7%、4.1%和9.7%。然而,这种效应因气候、土壤和管理措施而不同。在相对干旱的气候环境(年平均气温为 >15 ℃、年平均降雨 <600 mm)和恶劣的土壤条件(土壤体积质量>1.4 g/cm 、土壤有机碳含量 <5.8 g/kg、土壤全氮为 <0.75 g/kg)下,免耕条件下玉米生产力(籽粒产量和秸秆生物量)水平相对更好。其中,土壤有机碳含量和土壤速效钾含量与玉米籽粒产量呈显著负相关,年平均降雨和土壤速效磷含量与玉米籽粒产量和秸秆生物量呈显著负相关,土壤体积质量与玉米籽粒产量和秸秆生物量呈显著正相关。此外,肥料的高效施用、多样化的种植模式(间作或轮作)、秸秆还田等管理措施能抵消免耕条件下玉米生产力的负效应。总体而言,气候土壤环境相对更恶劣的区域可以从免耕技术上获益更多,而合理的田间管理措施也可以为免耕技术提供更好的生产力效应。
中文关键词:免耕  玉米  籽粒产量  秸秆生物量  叶面积指数  Meta分析
 
Effect of No-tillage on Maize Productivity:A Global Meta-analysis
Abstract:In this study, a global meta-analysis was couducted by synthesizing data from 1 043 data pairs extracted from 196 relevant studies.We assessed changes in maize grain yield, straw biomass, and leaf area index under no-tillage condition and explored the extent and direction of the influence of climate, soil, and management factors. The results showed that no-tillage significantly reduced maize grain yield, straw biomass, and leaf area index by 5.7%, 4.1%, and 9.7%, respectively, compared to conventional tillage. However, these effects varied depending on climate, soil and management practices. In relatively arid climatic conditions (annual average temperature >15 ℃, annual average rainfall <600 mm) and adverse soil conditions (soil volumic mass >1.4 g/cm3, soil organic carbon content <5.8 g/kg, soil total nitrogen <0.75 g/kg),maize productivity (grain yield and straw biomass) were relatively better under no-tillage conditions.Specially, soil organic carbon content and soil available potassium content were significantly negatively correlated with maize grain yield, while annual average rainfall and soil available phosphorus content were significantly negatively correlated with maize grain yield and straw biomass.Soil volumic mass was significantly positively correlated with maize grain yield and straw biomass. In addition, efficient fertilizer application, diversified cropping patterns (intercropping and crop rotation), and straw-return management can counteract the negative effects of maize productivity under no-tillage. In conclusion, regions with relatively harsh climate and soil conditions can benefit more from no-tillage technology, and proper field management practices can enhance the productivity effects of no-tillage.
keywords:No-tillage  Maize  grain yield  Straw biomass  Leaf area index  Meta-analysis
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