| 品种搭配对湖北省玉米-晚稻复种产量及资源效率的影响 |
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| 基金项目： | National Key Research and Development Program of China(2016YFD0300308);Special Fund for Agro-scientific Research in the Public Interest of China(201503122) |
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| 摘 要： |
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| 收稿时间： | 2020-03-24 |
Effects of varieties collocation between crop seasons on the yield and resource use efficiency of maize-late rice cropping in Hubei province |
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| Authors: | Zhi-Hui LIU Gao-Feng PAN Wen CHEN Ming-Guang QIN Cou-Gui CAO Chang-Long CHANG Ming ZHAN |
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| Institution: | 1.Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River Ministry of Agriculture and Rural Affairs / College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China;2.Xiangyang Academy of Agricultural Sciences, Xiangyang 441057, Hubei, China;3.Jingmen Soil and Fertilizer Station Jingmen 448000, Hubei, China |
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| Abstract: | Maize-late rice cropping (M-R) is considered to coordinate the production of food and feed crop. In recent years, M-R has begun to develop in the middle reaches of the Yangtze River. However, technologies have not been systematically studied and improved for its higher yield and higher resources use efficiency. Especially, a reasonable collocation of varieties between maize and late rice seasons is an important basis to realize the yield potential of M-R, and still is under evaluation. In this study, different maize and late rice varieties were selected and collocated to different M-R modes. Their yield performance and use efficiency of resources were detected in different regions of Hubei province in 2015 and 2017. The results showed that under different heat conditions, the varieties collocation modes had significant effects on the annual yield of M-R and the production efficiency of resources. The modes of medium maturity maize-late indica rice cropping had obviously higher annual yield and resource production efficiency under higher accumulated temperature (GDD≥10°C); on the contrary, the annual yield and resource production efficiency of the modes of early maturity maize-late indica rice cropping were higher under lower GDD≥10°C. The utilization percentage of the annual effective GDD≥10°C of each varieties combination mode could reach 95.6%-100.0%, and the distribution ratio of GDD≥10°c between previous and subsequent season (TR) had a significant non-linear relationship with the relative annual yield of M-R. When the utilization percentage of GDD≥10°C was 97.0%-98.5% and TR was 1.06-1.08, M-R could obtain highest annual yield. Therefore, suitable varieties of maize and late rice could be selected according to the local heat resource and reasonable TR. In summary, high-yield maize varieties with a growth period of 125 days and late rice varieties with a growth period of 140 days should be selected for the southern regions with higher GDD≥10°C, while high-yield maize varieties with a growth period of 120 days and late rice varieties with a growth period of 130 days should be selected for the middle and northern regions with relatively lower GDD≥10°C in Hubei province. |
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| Keywords: | maize-rice double cropping varieties collocation yield seasonal distribution of climate resources resource production efficiency |
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