摘要
采用FAO-56推荐的计算作物耗水量的双作物系数法,应用内蒙古正蓝旗的资料,分别计算了充分灌溉及水分胁迫条件下的作物蒸腾量,并和L i 6400光合作用仪的实测值进行了对比,用迭代反推法调整修正了当地优势牧草———老芒麦的基本作物系数,并用水分胁迫条件下的作物蒸腾进行校核,结果表明调整后的相对误差在15%以内,说明调整修正后的基本作物系数符合当地的气候条件及作物的实际生长状况,用调整修正后的基本作物系数更接近实测值,修正后的作物系数为0.131,0.686,0.496。
The dual crop coefficient approach recommended by FAO-56 was used to analyze the data in Zhenglan Banner of Inner Mongolia. The values of crop transpiration under adequate irrigation and water stress thus derived were compared with the actual measurements with LI 6400 Portable Photosynthesis System in the fields. Then the reversal interactive method was employed to revise and correct the basal crop coefficient of the local predominant grass, rye grass. The average relative error of this model was less than15%, indicating that the revised basal crop coefficient of rye grass was closer to the field-observed data than the FAO-recommended approach. The revised crop coefficients were 0, 131,0. 686 and 0. 496.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2006年第1期145-148,共4页
Journal of Southwest Agricultural University
基金
国家自然科学基金重点资助项目(50139040)
关键词
作物耗水量
参考作物蒸散量
光合作用
基本作物系数
Water requirement
Reference evapotranspiration
Photosynthesis
Basal crop coefficient
