摘要
由于春季土壤过湿造成播种推迟的现象,在辽宁省丹东地区每年都有不同程度的发生,对当地农业生产影响很大。本文利用丹东地区中部的凤城气象局观测的1987-2006年10 cm耕层的土壤湿度资料以及1986-2006年的气象资料,分析了当地历年春播期典型日(3月18日,入春;4月18日,气温通过10℃日;4月23日,春播)的土壤水分状况,用Z指数法进行的旱涝评价结果显示,分析期内当地春播期土壤水分处于正常范围的仅占20%,涝年和偏涝年占80%。
The postponed spring sowing time due to the excessive soil moisture happened to a different extent in Dandong District every year. Based on the meteorological and soil moisture data at 10cm depths represented the plough layer from 1987 to 2006, the status of the soil moisture in the typical spring sowing dates, such as March 18＇h, April 18＇h and April 23rd, was analyzed and The drought and waterlogging were assessed by Z-index method. The results showed that the years with the normal range of the soil moisture during the spring sowing time were only taken 20% , and 80% of years were with an excessive soil moisture, namely with the waterlogging.
出处
《中国农业气象》
CSCD
2008年第2期174-176,共3页
Chinese Journal of Agrometeorology
基金
丹东市农业产业化发展基金支持项目(丹农2006第17号)
关键词
春播期
土壤水分
早涝
Z指数法
Spring sowing time
Soil moisture
Drought and waterlogging
Z-index
