Soybean transpiration, vegetative morphology, and yield components following simulated and actual insect defoliation
Soybean transpiration, vegetative morphology, and yield components following simulated and actual insect defoliation
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模拟和实际昆虫落叶后的大豆蒸腾、营养形态和产量组成
DOI：
10.31274/rtd-180813-11088
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
K. Ostlie
中科院分区：
文献类型：
--
作者：
K. Ostlie
采用离体叶片和田间盆栽两种试验系统研究了大豆脱叶后的水分损失。切下叶片的蒸腾量随切边数的增加而增加。相反，大豆冠层蒸腾作用在两种鳞翅目食叶昆虫--绿色三叶草虫[Plathypena scabra [F.]）和甘蓝尺蠖（Trichoplusia ni [Hubner]），以及两种模拟方法，在小叶上打孔和采摘整个小叶。切叶边缘是离体叶片失水的一个重要决定因素，仅在去叶后的前16小时内增加失水。在去叶后的第一个16小时内，去叶方法也产生了蒸腾速率的过渡性差异。这些差异似乎与方法产生的“孔”特性有关。两种方法之间的总失水量无显著差异。因此，无论是冲压和采摘模拟方法产生可接受的保真度在大豆水分损失的实际昆虫落叶。
Soybean water-loss following defoliation was investigated in two ex perimental systems, excised leaves and field-grown potted plants. Tran spiration from excised leaves increased following defoliation as a linear function of cut edge per leaf. In contrast, transpiration from soybean canopies decreased following defoliation by two lepidopteran defoliators, the green cloverworm [Plathypena scabra [F.]) and the cabbage looper (Trichoplusia ni [Hubner]), and two simulation methods, punching holes in leaflets and picking entire leaflets. Cut leaf edge, an important deter minant of water loss from excised leaves, only increased water loss in the first 16 hours postdefoliation. Defoliation methods also produced transi tory differences in transpiration rates during the first 16 hours after de foliation. These differences seemed related to the "hole" characteristics produced by the methods. Total water loss did not differ significantly be tween methods. Therefore, both punch and pick simulation methods produced acceptable fidelity in soybean water-loss to actual insect defoliation.