Effect of straw mulching on water consumption components and crop coefficients in a maize field

文献类型： 外文期刊

第一作者： Qin, Shanshan

作者： Qin, Shanshan;Zhang, Yanqun;Mo, Yan;Gong, Shihong;Qin, Shanshan;Zhang, Yanqun;Mo, Yan;Gong, Shihong;Wang, Jiandong;Wang, Shuji

作者机构：

关键词： Straw mulching; sap flow; evaporation; transpiration; net radiation; canopy conductance

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：2.242； 五年影响因子：2.76 ）

ISSN： 0365-0340

年卷期：

页码：

收录情况： SCI

摘要： Clarifying the components and regulatory mechanisms of evapotranspiration is essential for irrigation scheduling. In this study, straw mulching and non-mulching treatments were set up in a maize field with drip irrigation, where the water use and related factors were determined in 2014 and 2015. Straw mulching slightly reduced evapotranspiration by 2.6% on average for the two years. However, transpiration of straw mulching increased by 10.0% and 9.0% and soil evaporation decreased by 36.0% and 31.1%, compared to the non-mulching treatment for 2014 and 2015, respectively. Straw mulching decreased the average crop coefficients of the entire growth period (from 1.03 to 1.01) while increasing them in the mid-growth period (from 1.20 to 1.22). The net radiation above the canopy for straw mulching was 92.3%-96.3% of that for non-mulching treatment, which could explain the lower evapotranspiration of the mulching treatment. The daytime canopy conductance of straw mulching was 30% higher than that of non-mulching treatment, which could potentially result in higher biomass. This study provided essential parameters for water management of drip irrigation maize fields with straw mulching in similar areas.

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