Irrigation control of cowpea plants using the measurement of leaf thickness under greenhouse conditions
Irrigation control of cowpea plants using the measurement of leaf thickness under greenhouse conditions
复制标题
DOI：
10.1007/s00271-011-0268-2
复制
发表时间：
2012-07
影响因子：
3
通讯作者：
Hans-Dieter Seelig;R. J. Stoner;J. Linden
中科院分区：
文献类型：
--
作者：
Hans-Dieter Seelig;R. J. Stoner;J. Linden
在这项研究中，豇豆叶片的厚度进行了测量，具有高的数据和时间分辨率，叶片厚度的动态随后被用作在温室水平的自动灌溉控制的输入参数。在非胁迫环境条件下，叶片厚度只有轻微的昼夜波动，几乎没有夜间波动。在极端水分亏缺胁迫的情况下，叶片厚度在短时间内急剧下降高达45%。在一个更现实的情况下，叶厚度保持相当恒定的几天，但大幅下降时，水分亏缺胁迫变得太严重，植物科普任何时间。叶厚度的这种特征性塌陷被用作灌溉自动启动的输入参数。在自动化灌溉后，植物快速地重新建立其标称叶片厚度，并将该叶片厚度保持恒定数天，直到通过随后的叶片厚度减小来发出需要下一次灌溉的信号。通过测量叶片厚度进行灌溉控制，与典型的定时灌溉计划相比，可以节省25%至45%的灌溉水。
In this study, the thickness of cowpea leaves was measured with high data- and time-resolution, and the dynamics of leaf thickness was subsequently used as an input parameter for automated irrigation control at the greenhouse level. Under non-stressful environmental conditions, leaf thickness showed only minor diurnal and almost no nocturnal fluctuations. In an extreme water deficit stress scenario, leaf thickness decreased dramatically by as much as 45% within a short period of time. In a more realistic situation, leaf thickness was kept fairly constant for several days, but decreased substantially when water deficit stress became too severe for the plants to cope with any longer. This characteristic collapse of leaf thickness was used as an input parameter for the automated initiation of irrigation. Upon automated irrigation, plants re-established their nominal leaf thickness quickly and kept this leaf thickness constant for several days, until signaling the need for the next irrigation by a subsequent decrease of leaf thickness. By using the measurement of leaf thickness for irrigation control, between 25 and 45% of irrigation water could be conserved compared with a typical timed irrigation schedule.