Close mixed-planting with paddy rice reduced the flooding stress for upland soybean
Close mixed-planting with paddy rice reduced the flooding stress for upland soybean
复制标题
与水稻密混种植减轻旱大豆的淹水胁迫
DOI：
10.1080/1343943x.2021.2021093
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发表时间：
2022
影响因子：
2.5
通讯作者：
Watanabe Yoshinori
中科院分区：
文献类型：
--
作者：
Iijima Morio;Hirooka Yoshihiro;Kawato Yoshimasa;Shimamoto Hitoshi;Yamane Koji;Watanabe Yoshinori
紧密混植是混植的一个新概念，它允许在各种胁迫条件下产生更大的互补效应;在这个系统中，氧气和/或水分通过两个物种紧密缠绕的根系进行转移。我们的目的是评估水稻是否可以通过紧密混合种植来缓解大豆的洪水胁迫。通过3年田间试验和1个水培试验，比较了短期淹水（或缺氧）胁迫下单种和密植混播的作物表现。混合大豆的存活率、光合速率和生物量生产均高于单一大豆植株。此外，由于洪水胁迫下的修正土地当量比始终大于1，水稻对大豆在高地轮作中短期洪水胁迫表现出更大的互补效应。因此，水稻作为大豆的伴生作物种植可以缓解短期的厌氧胁迫，促进大豆生长。
Close mixed-planting is a new concept of mixed cropping that allows greater complementary effects under various stress conditions; in this system, oxygen and/or water transfer occurs through the tightly entangled root system of the two species. We aimed to assess whether rice can alleviate flood stress in soybeans via close mixed-planting. A three-year field experiment and one water culture experiment were conducted to compare the crop performance between single and close mixed-planting under short-term flood (or anoxia) stresses. The survival rates, photosynthetic rates, and biomass production were higher in the mixed soybean than in the single soybean plants. Moreover, as the modified land equivalent ratio under flood stress was always >1, rice exhibited greater complementary effect on soybean against short-term flood stress in an upland field converted from paddy. Thus, rice planted as the partner crop of soybean can alleviate short-term anaerobic stress to enhance soybean growth.
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