Evapotranspiration, Yield and Crop Coefficient of Irrigated Maize Under Straw Mulch

ZHANG Xi-Ying; CHEN Su-Ying; PEI Dong; LIU Meng-Yu; SUN Hong-Yong

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Evapotranspiration, Yield and Crop Coefficient of Irrigated Maize Under Straw Mulch

机译：秸秆覆盖下灌溉玉米的蒸散，产量和作物系数。

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Maize (Zea mays L.), a staple crop grown from June to September during the rainy season on the North China Plain,is usually inter-planted in winter wheat (Triticum aestivum L.) fields about one week before harvesting of the winter wheat. In order to improve irrigation efficiency in this region of serious water shortage, field studies in 1999 and 2001, two dry seasons with less than average seasonal rainfall, were conducted with up to five irrigation applications to determine evapotranspiration, calculate the crop coefficient, and optimize the irrigation schedule with maize under mulch, as well as to establish the effects of irrigation timing and the number of applications on grain yield and water use efficiency (WUE)of maize. Results showed that with grain production at about 8000 kg ha-1 the total evapotranspiration and WUE of irrigated maize under mulch were about 380-400 mm and 2.0-2.2 kg m-3, respectively. Also in 2001 WUE of maize with mulch for the treatment with three irrigations was 11.8% better than that without mulch. In the 1999 and 2001 seasons, maize yield significantly improved (P = 0.05) with four irrigation applications, however, further increases were not significant. At the same time there were no significant differences for WUE with two to four irrigation applications.In the 2001 season mulch lead to a decrease of 50 mm in the total soil evaporation, and the maize crop coefficient under mulch varied between 0.3-1.3 with a seasonal average of 1.0.

机译：玉米（Zea mays L.）是华北平原雨季在6月至9月间生长的一种主要农作物，通常在收获冬小麦前一周左右在冬小麦（Triticum aestivum L.）田间间种。。为了提高严重缺水地区的灌溉效率，在1999年和2001年进行了两次干旱季节平均降雨量少于平均水平的干旱季节的实地研究，确定了五种灌溉方式，以确定蒸散量，计算作物系数并优化覆盖玉米的灌溉时间表，以及确定灌溉时间和施肥次数对玉米籽粒产量和水分利用效率（WUE）的影响。结果表明，在产量为8000 kg ha-1的情况下，覆盖条件下灌溉玉米的总蒸散量和WUE分别约为380-400 mm和2.0-2.2 kg m-3。同样在2001年，采用三层灌溉处理的地膜覆盖玉米的WUE比未覆盖地膜的WUE改善了11.8％。在1999年和2001年的季节中，四次灌溉后玉米产量显着提高（P = 0.05），但是进一步的提高并不显着。同时，两到四次灌溉的WUE没有显着差异。在2001年季节，覆盖导致土壤总蒸发量减少50 mm，并且覆盖下的玉米作物系数在0.3-1.3之间变化，其中季节性平均值为1.0。

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来源
《土壤圈（英文版）》 |2005年第5期|576-584|共9页
作者
ZHANG Xi-Ying; CHEN Su-Ying; PEI Dong; LIU Meng-Yu; SUN Hong-Yong;
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作者单位

Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021 (China);

Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021 (China);

Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021 (China);

Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021 (China);

Shijiazhuang Institute of Agricultural Modernization, Chinese Academy of Sciences, Shijiazhuang 050021 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类大气科学（气象学）;
关键词
crop coefficient; maize; mulch; water use efficiency;

机译：作物系数玉米覆盖水分利用效率;

Evapotranspiration, Yield and Crop Coefficient of Irrigated Maize Under Straw Mulch

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