文献类型： 外文期刊
作者： Hou, Peng 1 ; Liu, Yuee 1 ; Liu, Wanmao 1 ; Liu, Guangzhou 1 ; Xie, Ruizhi 1 ; Wang, Keru 1 ; Ming, Bo 1 ; Wang, Yonghong 4 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Minist Agr & Rural Affairs, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Maize Res Ctr, Beijing 100097, Peoples R China
3.Shihezi Univ, Coll Agron, Key Lab Oasis Ecoagr, Xinjiang Prod & Construct Grp, Shihezi 832000, Peoples R China
4.Ningxia Acad Agr Sci, Inst Crop Sci, Yongning 750105, Ningxia Hui Aut, Peoples R China
5.Jilin Acad Agr Sci, Inst Agr Resources & Environm, Taonan 130034, Peoples R China
6.Guizhou Acad Agr Sci, Guiyang 550006, Peoples R China
7.Shandong Agr Univ, Coll Agron, Tai An 271018, Shandong, Peoples R China
8.Inst Henan Xunxian Agr Sci, Xunxian 456284, Peoples R China
9.Luohe Acad Agr Sci, Luohe 462300, Peoples R China
10.Liaoning Acad Agr Sci, Inst Maize, Shenyang 110161, Peoples R China
11.Dandong Acad Agr Sci, Dandong 118109, Peoples R China
12.Heilongjiang Acad Land Reclamat & Agr Sci, Inst Crops, Haerbin 150038, Peoples R China
13.Inner Mongolia Agr Univ, Hohhot 010018, Peoples R China
14.Jilin Acad Agr Sci, Jilin 132001, Jilin, Peoples R China
15.Agr Tech Extens Ctr Zunhua, Zunhua 064200, Peoples R China
16.Shanxi Acad Agr Sci, Inst Maize, Xinzhou 034000, Peoples R China
17.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
18.Yulin Agr Technol Work Stn, Yulin 719000, Peoples R China
19.Mianyang Acad Agr Sci, Mianyang 621023, Sichuan, Peoples R China
20.Tonghua Acad Agr Sci, Tonghua 135007, Peoples R China
21.Nenjiang Inst Agr Sci, Qiqihar 161041, Peoples R China
22.Agr Tech Extens Ctr Tongliao, Tongliao 028000, Peoples R China
23.Laizhou Jinhai Seed Ind Co Ltd, Laizhou 261418, Peoples R China
24.Sichuan Acad Agr Sci, Inst Crop Sci, Chengdu 610066, Peoples R China
25.Suzhou Acad A&F Sci, Suzhou 234000, Peoples R China
关键词： Maize production; Nitrogen; Density; Reactive N losses intensity; GHG intensity
期刊名称：RESOURCES CONSERVATION AND RECYCLING （ 影响因子：10.204； 五年影响因子：9.97 ）
ISSN： 0921-3449
年卷期： 2020 年 160 卷
页码：
收录情况： SCI
摘要： Increasing crop yields while reducing environmental impacts are a great challenge to ensuring food security and environmental quality for the world agriculture. Increasing planting density appropriately is one of the most effective strategies for increasing maize (Zea mays L.) yield. In China, overuse of nitrogen (N) fertilization on maize has resulted in excessive N surplus in the soil and environmental impacts. To address this challenge we conducted 212 site-year field experiments at two planting densities of 60000 and 75000 plants per ha with the same inputs of N. Results showed that maize yield could be increased 5.59% across China and 10.5%, 2.7%, 5.2% and 10.3% respectively in Southwest (SW), Huanghuaihai (HM), North (NM) and Northwest (NW) maize regions without extra inputs of N. The Life-cycle assessment showed that reactive N loss intensity and GHG intensity decreased by 2.2% to 10.2% across different regions of China, indicating that yield increase could be achieved without extra N inputs and further negative environmental impacts if planting density was increased by 15000 plants per ha under the current condition of excessive N surplus in China. If farmers in China increase maize planting density by 15000 per ha across the whole country the total maize production from the same planting area of 2017 would be 290 Mt which will be close to the expected demand of 315 Mt by 2030 while reducing the environmental impacts of intensive agriculture.
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