Quantification of the crop stem flow in the sprinkler irrigated field |
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| Authors: | Kozue Yuge Mitsumasa Anan |
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| Institution: | (1) Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581, Japan;(2) Takasaki Sogo Consultant, Co. Ltd, 3-7-5 Higashiaikawa, Kurume-Shi, Fukuoka 839-0809, Japan |
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| Abstract: | In sprinkler irrigated fields, irrigation water is intercepted by crop leaves. This water can be separated into several categories
depending on its movement. In this study, the categories are defined as crop stem flow water, leaf storage water, and drop
water to the soil. Crop stem flow water is especially effective for crop growth because it reaches the soil surface near the
root zone. The objective of this study is to develop a method for quantifying crop stem flow water. Field observation is conducted
to observe the movement of irrigation water droplets and to quantify the varying amounts of crop stem flow water, leaf storage
water, and drop water to the soil. The measurement of the amount of leaf storage water indicates that droplet movement on
the leaf changes constantly. To quantify three components of irrigated water, considering the continuous change of droplet
movement on the leaf surface, a simulation model is developed. The simulated amounts of crop stem flow water, leaf storage
water, drop water to the soil successfully reproduce the observed result, and model accuracy can be verified. |
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