中国生态农业学报2016，Vol.24Issue(7)：926-934,9.DOI:10.13930/j.cnki.cjea.160156
基于Hybrid-maize模型的吉林省不同生态区玉米产量潜力研究
Analysis of yield potential of maize in different ecological regions in Jilin Province using Hybrid-maize model
摘要
Abstract
AbstractJilin Province is an major maize production area in China and it significantly contributes to national food security. Because of limited cultivatable land and adjustment of planting structure, the potential to increase maize planting area in Jilin Province is limited. Future increase in maize yield will mainly rely on yield improvement per cultivated unit area. Thus fully promoting the potential of maize production and per unit area yield constitutes an effective way of comprehensively improving maize productivity in Jilin Province. In this study, the Hybrid-maize model validated in Northeast China and long-term meteorological data combined with results of experiments of different maize varieties, sowing dates and planting densities were used to simulate maize potential yield in different ecological regions [humid region (Huadian), semi-humid region (Gongzhuling) and semi-arid ecological region (Qian’an)] in Jilin Province. At the same time, the driving factors of high and stable maize yield were analyzed based on potential yield variations and production characteristics of maize varieties. Finally, a high-yield system of maize was established. The main results of the study showed that: 1) Changing sowing date was a critical measure for yield increase. However, there were differences in performance among different ecological regions. Early sowing was required in humid region (Huadian), and the appropriate sowing date was about April 20. In contrast, late sowing was required in the other two ecological regions, with proper sowing times in mid-May. 2) The order of maize tolerance to high planting density for the different ecological regions in Jilin Province was: humid region (Huadian) > semi-humid region (Gongzhuling) > semi-arid region (Qian’an). The suitable densities in the three regions were 90 000, 80 000 and 75 000 plants·hm-2, respectively. 3) Variety with longer growth period had higher yield potential. In practice, late-maturing variety selection depended on different regional ecological conditions. In semi-humid and semi-arid regions, it was necessary to increase GDD varieties to over 1 600℃ under current sowing date conditions. 4) According to the above results, the comprehensively optimized management measure for high-yield system was established, and the simulated long-term average yield potential of high-yield system increased by 14.39%–29.23% compared with the current production system. The study provided theoretical basis for proper cultivation measures of high-yield crop varieties. It also provided technical reference for large-scale production of maize in Jilin Province.关键词
Hybrid-maize模型/生态区/玉米/产量潜力/高产栽培体系/吉林省Key words
Hybrid-maize model/Ecological region/Maize/Yield potential/High-yield system/Jilin Province分类
农业科技引用本文复制引用
曹玉军,吕艳杰,王晓慧,魏雯雯,姚凡云,刘春光,王立春,王永军..基于Hybrid-maize模型的吉林省不同生态区玉米产量潜力研究[J].中国生态农业学报,2016,24(7):926-934,9.基金项目
国家科技支撑计划课题(2013BAD07B02)、国家现代农业产业技术体系(CARS02-17)和吉林省科技发展计划(20150519010JH, LFGC14217)资助* Funded by the National Key Technology R&D Program of China (2013BAD07B02), the National Modern Agriculture Industry Technology System (CARS02-17) and the Science and Technology Development Plan of Jilin Province (20150519010JH, LFGC14217) （2013BAD07B02）
