2016年林芝地区冬小麦严重渍涝的成因分析

Cause Analysis of Serious Waterlogging of Winter Wheat in Nyingchi Prefecture in 2016

针对林芝地区2016年冬小麦发生的减产绝收情况,分析了土壤相对湿度、降水、日照及灾害指标等因素。对比历年同期值,进行数据分析。结果表明,2016年夏季(6—8月),林芝地区平均气温偏高,平均降水偏多,平均日照时数偏少。而6—7月冬小麦正处于开花—乳熟—成熟期,在持续的40 d内,平均相对湿度大于90%,降水总量高达344.7 mm,日照总时数仅为141.4 h。因此,这次渍涝灾害严重地阻碍了冬小麦的开花、灌浆及成熟,最终导致冬小麦减产绝收。

Several causes of low productions even few harvests of winter wheat in Nyingchi prefecture in 2016 have been analyzed in this paper, such as relative soil humidity,precipitation, sunshine and disaster index. Compared with the meteorological datas in the same period over recent years, the data analysis was conducted.The results showed that in the summer of 2016（from June to August） ,both the average temperature and precipitation were higher, but the average sunshine hours were less than that in the same period over recent years. The winter wheat in Nyingchi Prefecture was in the period of flowering-ripeness-maturing every year from June to July. Meanwhile, the average relative humidity was continuously greater than 90% over 40 days, the total precipitation was as high as 344.7 mm, while the total number of sunshine hours was only 141.4 hours. Consequently, this waterlogging disaster seriously hindered the flowering, grouting and maturity of winter wheat, which finally leaded to an output reduction even no harvest.