吴雨珊, 龚万灼, 杨文钰, 雍太文, 杨峰, 刘卫国, 武晓玲. 带状套作复光后不同大豆品种干物质积累模型与特征分析[J]. 中国生态农业学报(中英文), 2017, 25(4): 572-580. DOI: 10.13930/j.cnki.cjea.160928
引用本文: 吴雨珊, 龚万灼, 杨文钰, 雍太文, 杨峰, 刘卫国, 武晓玲. 带状套作复光后不同大豆品种干物质积累模型与特征分析[J]. 中国生态农业学报(中英文), 2017, 25(4): 572-580. DOI: 10.13930/j.cnki.cjea.160928
WU Yushan, GONG Wanzhuo, YANG Wenyu, YONG Taiwen, YANG Feng, LIU Weiguo, WU Xiaoling. Dynamic model and characteristics analysis of dry matter production after light recovery of different soybean varieties in relay strip intercropping systems[J]. Chinese Journal of Eco-Agriculture, 2017, 25(4): 572-580. DOI: 10.13930/j.cnki.cjea.160928
Citation: WU Yushan, GONG Wanzhuo, YANG Wenyu, YONG Taiwen, YANG Feng, LIU Weiguo, WU Xiaoling. Dynamic model and characteristics analysis of dry matter production after light recovery of different soybean varieties in relay strip intercropping systems[J]. Chinese Journal of Eco-Agriculture, 2017, 25(4): 572-580. DOI: 10.13930/j.cnki.cjea.160928

带状套作复光后不同大豆品种干物质积累模型与特征分析

Dynamic model and characteristics analysis of dry matter production after light recovery of different soybean varieties in relay strip intercropping systems

  • 摘要: 为了研究套作下高产类型大豆复光后的干物质积累特征,本研究共采用14个高、中、低产量水平的大豆为材料,比较了不同大豆产量类型品种与玉米套作,复光后的干物质积累特征差异。结果表明:1)高产类型大豆复光后干物质积累量为32.99 g·plant-1,较中、低产类型分别高26.82%和91.51%(两年均值)。2)不同产量类型大豆复光后干物质积累速率均呈先增加后下降的趋势,复光后最大干物质积累速率和平均干物质积累速率呈高产类型>中产类型>低产类型,高产类型大豆最大干物重积累速率的时间大致在复光后41~42 d,中低产类型则在复光后33~37 d;高产类型大豆复光后干物质渐增期天数、积累速率和干物质积累量以及快增期和缓增期的积累速率和积累量均显著高于中、低产类型。3)产量与最大干物质积累速率、最大干物质积累速率时间、平均干物质积累速率、渐增期的持续时间及干物质增量、快增期平均积累速率及干物质增量、缓增期平均积累速率及干物质增量呈显著正相关。本研究表明,套作下高产类型大豆复光后较强的干物质积累优势主要表现在复光后渐增期,而复光后渐增期较强的干物质积累能力主要在于其较长的渐增期持续天数。

     

    Abstract: Maize-soybean relay strip intercropping is a widespread practice in soybean production areas in southwestern and southern China and has been the main mode of increasing total output of soybean in China. To provide theoretical basis for the selection and breeding of high yield soybean varieties for intercropping, this study used fourteen soybean varieties with different yield levels to analyze the characteristics of dry matter production after light recovery (after maize harvest) of different yield types of soybean varieties relay strip intercropped with maize. Results indicated that average grain yield of high yield soybean varieties was 1 408.17 kg·hm-2, which was 37.45% and 57.25% higher than those of medium and low yield varieties, respectively. Dry matter accumulation of high yield soybean varieties was on an average of 32.99 g·plant-1, which was 26.82% and 91.51% higher than those of medium and low yield varieties, respectively. Logistic equation was used to simulate the relationship between dry matter weight and days after light recovery for three types of soybean varieties (R2≥0.960). Paired t-test for independent samples showed no significant difference between the simulated and measured values. After light recovery, the rate of dry matter accumulation of three types of soybean varieties increased before declining. The order of maximum rate of dry matter accumulation and the mean rate of dry matter accumulation was high yield type > medium yield type > low yield type. The average time to maximum rate of dry matter accumulation after light recovery of the high yield soybean varieties was 41-42 days, while that of both medium and low types was 33-37 days. The duration, accumulation rate and accumulation amount of dry matter of gradual increase stage; the accumulation rate and amount of dry matter accumulation of both fast increase and slow increase stages of high yield soybean were significantly higher than those of other two yield types of soybean. The yield had a significantly positive correlation with the maximum dry matter accumulation rate, time reaching the maximum dry matter accumulation rate, mean dry matter accumulation rate, duration of gradual increase stage, dry matter weight of gradual increase stage, dry matter accumulation rate and weight of both fast and slow increase stages. Two years data indicated that leaf area index, light interception rate, population growth rate and leaf area duration of high yield soybean were 2.52 g·m-2·d-1, 0.81 g·m-2·d-1, 6.02 g·m-2·d-1 and 317.84 m2·d·m-2, respectively, which were significantly higher than those of both medium and low yield types. Our results suggested that greater dry matter accumulation mainly occurred at gradual increase stage after light recovery for high yield soybean varieties, which was mainly attributed to the longer duration of the stage.

     

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