摘要
在综合分析气候、作物生物学特性和土壤湿度三方面因素的基础上,利用多年的田间试验资料,建立了旱作小麦农田实际蒸散量的计算模式,并利用农田实际蒸散量的测量值,对模式进行了验证。结果表明,模式计算精度较高,相对误差基本在±10%之内,可以作为计算农田实际蒸散量的一种方法而使用。
On the basis of comprehensive analysis of climatic factors, biological features and soil humilities, the biological characteristics of a crop were thought to hide in the changes of its rhizosphere moisture to some extent. Meantime, crop index was introduced considering the field evapo-transpiration under actual circumstances and thought to contain the biological characteristics of the crop to some extent. Based on what had been mentioned above, and using perennial data collected by the field experiments, a model to compute the actual evapo-transpiration in the field of rain-fed wheat was established and verified with the evapo-transpirations directly measured in the field. The results revealed that the model had high precision with its relative error ranging within ±10% and could be used as another method to compute the field evapo-transpiration.
出处
《干旱地区农业研究》
CSCD
北大核心
2005年第1期34-38,共5页
Agricultural Research in the Arid Areas
基金
甘肃省自然科学基金项目"甘肃河东干旱监测预警服务系统的研究"(ZR-95-066)
