| 曹振凯,李 毅,冯 浩,赵 英,何建强.不同覆盖条件下冬小麦作物系数试验研究[J].干旱地区农业研究,2015,33(6):29~34 |
| 不同覆盖条件下冬小麦作物系数试验研究 |
| Experimental study on crop coefficients of winter wheat under different mulchings |
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| DOI：10.7606/j.issn.1000-7601.2015.06.05 |
| 中文关键词: 冬小麦 作物系数 覆盖 参考作物蒸发蒸腾量 实际作物蒸发蒸腾量 |
| 英文关键词:winter wheat crop coefficient mulching reference crop evapotranspiration actual crop evapotranspiration |
| 基金项目:国家高技术研究发展‘863’计划（2013AA102904）；西北农林科技大学基本科研业务费(2452015182) |
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| 中文摘要: |
| 试验共设置裸地（CK）、秸秆覆盖（JF）、地膜覆盖（DF）3个处理，基于冬小麦2013—2014年实测数据及气象数据，利用Penman-Monteith公式计算杨凌地区冬小麦全生育期内参考作物蒸发蒸腾量，利用农田水量平衡方程计算冬小麦全生育期实际作物蒸发蒸腾量，由此计算冬小麦各生育阶段的作物系数。结果表明：秸秆覆盖和地膜覆盖可以减少冬小麦全生育期的作物需水量，减少量分别为13.07 mm和17.86 mm；秸秆覆盖处理对水分比较敏感；作物系数在全生育期呈双峰变化，峰值出现在分蘖～越冬期和抽穗～灌浆期，其中CK为0.82和1.16，JF为0.89和1.05，DF为0.87和1.13；冬小麦作物系数与种植后天数和大于0℃积温呈现良好的四次多项式和二次多项式关系，其中JF与DF的相关系数均在0.88以上。 |
| 英文摘要: |
| In this paper, three treatments were set including bare land (CK), straw mulching (JF) and film mulching (DF). According to the measured data of winter wheat between 2013 and 2014 and the meteorological data, the reference crop evapotranspiration of winter wheat in Yangling during various growing periods was calculated through the adoption of Penman-Monteith formula, and the actual crop evapotranspiration was achieved by adopting the formula of field water balance equation. Hence, the variations of crop coefficients during different growing periods were analyzed. The results implied that straw mulching and film mulching could reduce the water requirement amounts by 13.07 mm and 17.86 mm, respectively, in winter wheat during various growth periods. Straw mulching had more sensitive response to water than the other two methods. Crop coefficients were shown to have a bimodal variation pattern throughout the entire growth period, while the summits appeared at the tillering-wintering and heading-filling periods. The two peaks in CK, JF, and DF treatments were 0.82 and 1.16, 0.89 and 1.05, and 0.87 and 1.13, respectively. At the same time, there were good forth-order-polynomial and second-order-polynomial correlations respectively between Kc and both the days after sowing and the cumulative temperature above 10℃, with correlation coefficients in JF and DF treatments above 0.88. |
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