Crop yields under no-till farming in China: A meta-analysis

作者

Zhao, Xin; Liu, Sheng-Li; Pu, Chao; 更多内容

期刊:EUROPEAN JOURNAL OF AGRONOMY ISSN:1161-0301 , 年:2017 . 卷:84 页码:67-75

语种: English

原文链接:http://dx.doi.org/10.1016/j.eja.2016.11.009

摘要

No-till (NT) farming is popular globally, however, the effects on crop yields remain debatable. A meta analysis was conducted on crop yield responses to NT in China based on 1006 comparisons from 164 studies. Results showed that a decrease of 2.1 +/- 1.8% on crop yield was observed under NT with residue removed (NTO) compared with that under plow tillage with residue removed (PTO), but the decreases can be diminished to 1.9 +/- 1.0% when residue retention was combined with both the two tillage practices. On the contrary, NT with residue retention (NTR) may significantly increase crop yields by 4.6 +/- 1.3% compared with that under PTO (P < 0.05). Along with improvements in crop yields, increases in soil organic carbon (SOC) by 10.2 7.2%, available nitrogen (N) by 9.4 +/- 5.4%, available potassium by 10.5 +/- 8.8%, and water storage by 9.3 +/- 2.4% was observed under NTR compared with PTO, indicating that improvements in soil quality could benefit crop productivity under NTR. Categorically, results on meta-analysis and regression indicated large variations in crop yields under NTR because of differences in crop species, temperature and precipitation, antecedent SOC level, N fertilizer input, duration of adoption, and with or without residue retention. For example, crop yields significantly increased with increase in duration (P < 0.0001) under NTR, by 21.3% after 10 years of continuous NTR compared with PTO. Adoption of NTR under appropriate site-specific conditions can advance China's food security, improve yield stability and alleviate soil-related constraints. (C) 2016 Elsevier B.V. All rights reserved.

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关键词
Crop yield; No-till; Residue retention; Soil quality; Meta-analysis; Food security

附加关键词:
SOIL CARBON SEQUESTRATION; LONG-TERM TILLAGE; CONSERVATION AGRICULTURE; CLIMATE-CHANGE; PHYSICAL-PROPERTIES; ECOSYSTEM SERVICES; FOOD SECURITY; PRODUCTIVITY; IMPACTS; SYSTEMS

作者信息

通讯作者:
     Zhang, HL , China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China.; Zhang, HL , Minist Agr China, Key Lab Farming Syst, Beijing 100193, Peoples R China.
作者机构:
     [1] [ Zhao, Xin; Liu, Sheng-Li; Pu, Chao; Zhang, Xiang-Qian; ︾ ] China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China.
     [2] [ Zhao, Xin; Liu, Sheng-Li; Pu, Chao; Zhang, Xiang-Qian; ︾ ] Minist Agr China, Key Lab Farming Syst, Beijing 100193, Peoples R China.
     [3] [ Xue, Jian-Fu ] Shanxi Agr Univ, Coll Agr, Taiyuan 030801, Shanxi, Peoples R China.
     [4] [ Lal, Rattan ] Ohio State Univ, Sch Environm & Nat Resources, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA.
作者邮箱:
     hailin@cau.edu.cn