کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4480169 | 1316477 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evapotranspiration and crop coefficient of spring maize with plastic mulch using eddy covariance in northwest China
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
Spring maize under plastic mulch is the staple food crop in northwest China. Studying its evapotranspiration (ET) and crop coefficient (Kc) is important for managing water-saving irrigation in the region. Eddy covariance (EC) was applied to measure spring maize ET in 2007 in northwest China, focusing on the characteristics of the maize ET and Kc processes under plastic mulch. An interesting result was that a higher Kc in this study relative to the value of FAO 56 was presented in the mid and late season, e.g. average Kc was 1.46, 1.39 and 1.22 during the heading, filling and maturity stage, respectively. This result was mainly due to that (1) the plastic mulch had an effect on anti-senescence of maize and great green leaf still existed before the harvest; (2) the FAO 56 PM model may underestimate the reference crop ET in the mid and late season of maize in the region; (3) the planting density was higher in the study, which was about 374,800 plants haâ1. Though Kc during the mid and late season was high, a high water use efficiency of 25.2 kg haâ1 mmâ1 was still obtained in the study. Our study confirmed that plastic mulch has beneficial effect on improving maize water use efficiency in this severe water shortage region of northwest China.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 95, Issue 11, November 2008, Pages 1214-1222
Journal: Agricultural Water Management - Volume 95, Issue 11, November 2008, Pages 1214-1222
نویسندگان
Sien Li, Shaozhong Kang, Fusheng Li, Lu Zhang,