| Comprehensive benefits evaluation of spring wheat multiple cropping forage grass in Ningxia Yellow River irrigation area |
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| DOI：10.7606/j.issn.1000-7601.2022.01.06 |
| Key Words: Ningxia Yellow River irrigation area spring wheat forage grass multiple cropping comprehensive benefits |
| Author Name | Affiliation | | LIU Lulu | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | LIU Genhong | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | MAI Xiaofeng | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | XUE Yinxin | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHANG Qian | College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China | | YANG Shiqi | Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: |
| The experiment was conducted to study the planting benefit and potential of different forage species and explore the efficient grain and feed planting modes of multiple cropping after wheat planting in Ningxia Yellow River irrigation area. It was hoped that the study would provide theoretical support for the reform of multiple cropping in this area. The main agricultural meteorological data from 2010 to 2019 in the irrigation area of Ningxia were compiled. Using the analytic hierarchy process (AHP), three secondary indexes of the economic benefit, the resources use efficiency and soil fertility improvement and 12 of the third level indexes including net income and VCR were selected among 8 types of grass (Sudan grass, small 70 rye, oats, rye, winter arrow Kuo peas, sweet clover, sorghum, rape) for comprehensive evaluation in the spring wheat cropping irrigation area of Ningxia. The mean temperature, maximum temperature and minimum temperature in Ningxia Yellow River irrigation area in recent ten years were 10.5℃, 37.0℃ and -19.0℃, respectively. The average annual accumulated temperature ≥0℃ and ≥10℃ was 4 269℃ and 3 569℃, respectively, and the warming rate was 211.71℃·10a-1. The number of sunshine hours showed a significant downward trend. The average length of sunshine hours was 2 933 h, and the trend rate was -10.36 h·10a-1. The analytic hierarchy process (AHP) to spring wheat in the irrigation area of 8 kinds of forage grass comprehensive analysis showed that rape in the three-level index C1~C8 (the actual yield of theoretical yield ratio, water productivity, output rate of nitrogenous fertilizer, phosphate fertilizer production, output, net income, VCR, crude protein content) had high performance, and the benefit values were 0.35, 0.35, 0.10, 0.10, 1.35, 1.20, 0.80, 0.30. The benefit values of arrowhead pea in C9~C11 (organic matter, alkali\|hydrolyzed nitrogen and available phosphorus) were 0.20, 0.09 and 3.26, respectively. The value of C12(reciprocal of pH) was 0.05, which showed a higher benefit. The climatic resources in Ningxia Yellow River irrigation area theoretically met the growth demand of crops with two short growth periods after multiple cropping of wheat. The highest comprehensive benefit of multi\|planting forage after wheat was rape, with a value of 7.16 (followed by arrowhead pea, sweet clover, sorghum and oat), which was suitable for large\|scale production in the irrigated area. |
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