Determination of crop water use and coefficient in drip-irrigated cotton fields in arid regions
Determination of crop water use and coefficient in drip-irrigated cotton fields in arid regions
复制标题
干旱区滴灌棉田作物用水量及系数的确定
DOI：
10.1016/j.fcr.2019.03.008
复制
发表时间：
2019-04
影响因子：
5.8
通讯作者：
Jiansheng Cao
中科院分区：
文献类型：
--
作者：
Shumin Han;Yonghui Yang;Huilong Li;Yanmin Yang;Jiusheng Wang;Jiansheng Cao
A 3-year field experiment was conducted in Aksu region in Northwest China to determine crop water use, suitable irrigation mode and actual crop coefficient (Kc) in drip-irrigated cotton fields. In the experiment, 12 non-weighing large lysimeters were used to measure cotton water use under various irrigation modes. Then a micro-lysimeter was placed in each large lysimeter to monitor soil evaporation (E). Adjustments were done for a number of factors (including irrigation, meteorology, plastic mulching, water stress and salinity stress) in order to compare FAO-adjusted Kc(Kc-FAO) with the local actual Kc(Kc-loc). The results showed that: 1) plastic mulching with 0.6 cover ratio and 37.5 mm drip irrigation quota gave a crop water requirement of 536.4 mm; which was suitable for the study area. Also Kc-locwere respectively 0.28, 0.97 and 0.31 for early, middle and late growth stages. 2) Kc-FAOgenerally reflected the trend in Kc-locfor the entire growing season. The suggested 0.1 adjusted coefficient under plastic mulching for the initial growth stage was relatively low, and was most rational for the study area when increased to 0.25. 3) E/ET ratio was low (19.1–24.5%) under mulching treatment and relatively high (27.7–32.7%) under non-mulching treatment. 4) While change in E/EToratio was linear or logarithmic, that in T/EToratio was a power function of the canopy cover. Also the two rates responded to the interaction effects of canopy cover and soil water content. The results could lay the basis for developing scientific, data-driven water-saving strategies in the study area and elsewhere.
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影响因子：
3
作者：
Rahnama, Afrasyab;James, Richard A.;Munns, Rana
通讯作者：
Munns, Rana
影响因子：
4.9
作者：
M. A. Parra;G. Romero
通讯作者：
M. A. Parra;G. Romero
测定田间蒸散量的方法比较：光合作用系统、液流和涡流协方差
影响因子：
6.3
作者：
Zhang, Z.;Tian, F.;Hu, H.;Yang, P.
通讯作者：
Yang, P.
影响因子：
2.4
作者：
Hu Hongchan
通讯作者：
Hu Hongchan
影响因子：
2.1
作者：
F. Villalobos;E. Fereres
通讯作者：
F. Villalobos;E. Fereres