Growth and yield response of common buckwheat (Fagopyrum esculentum Moench) to waterlogging at different vegetative stages
Growth and yield response of common buckwheat (Fagopyrum esculentum Moench) to waterlogging at different vegetative stages
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DOI：
10.1080/1343943x.2019.1670682
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发表时间：
2019-10-06
影响因子：
2.5
通讯作者：
Takeshima, Ryoma
中科院分区：
文献类型：
--
作者：
Koyama, Takuya;Suenaga, Momo;Takeshima, Ryoma
这项研究确定了时间（第1、第3或第5叶期）和持续时间（1、3、6或10？结果表明，营养生长期淹水处理对产量影响最大，并阐明了其产量决定过程。3叶期涝渍处理对产量的影响最大。在各阶段中，当处理持续时间大于6？天1次枝梗种子重量的下降幅度大于主茎和2次枝梗，约占种子总重量的55%。另一方面，在成熟期，第二分枝的节数和分支数的下降比第一分枝更明显。成熟期二次枝的发育对库容量的增加贡献不大。主茎和一级分枝的发育几乎完全，直到盛花期，地上部干重从盛花期到成熟期没有增加。盛花期地上部干重由叶片数和净同化率（NAR）决定。该阶段的花簇数与种子总重量呈显著相关。结果表明，该病害的临界期在三叶期，临界持续时间大于6天。结果表明，保持叶片数和NAR，使一次枝花发育到盛花期，是保证产量的关键。
This study identified timing (1st, 3rd, or 5th leaf stage) and duration (1, 3, 6, or 10?days) of waterlogging treatment during the vegetative stage that had the most severe effect on yield and elucidated yield determining process. Yield was reduced the most by the waterlogging treatments at the 3rd leaf stage. Among stages, yield was significantly depressed, when the treatment duration was longer than 6?days. Seed weight of the 1st branches declined more under waterlogging treatments than did that of main stem and 2nd branches, accounting for approximately 55% of total seed weight in all treatments. On the other hand, the decline in node and branch numbers was more pronounced for 2nd branches than 1st branches at the ripening stage. The development of the 2nd branches during ripening did not contribute much to increase sink capacity. Development of the main stem and the 1st branches was almost complete until the full flowering stage and shoot dry weight did not increase from the full flowering stage to the ripening stage. Shoot dry weight at the full flowering stage was determined by both leaf number and net assimilation rate (NAR). Flower cluster number at that stage was significantly correlated with total seed weight. These results showed that the critical timing was at the 3rd leaf stage and the critical duration was longer than 6?days and indicated that maintenance of leaf number and NAR and development of flowers on the 1st branches until the full flowering stage would ensure the yield.