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一、渍害发生原因1998年我县小麦单产254.6kg,较平均年份减产120kg,渍害是其减产的主要因素.分析渍害发生的原因如下:1.气象条件:渍害严重的1998年,入春后,阴雨天数47d,占入春后的小麦生育期的1/3强,其间总降雨量416.4mm,比常年多209.2mm,其中3～6月份降雨365.5mm,是常年同期的2倍.此时正值我县小麦生育中后期,抗渍能力较差.2.栽培技术与管理措施不到位:①沟系不配套,据调查1998年三麦沟系配套较完善的不到1/3,沟系配套差是渍害发生的主要人为因素。
First, the causes of soil injury occurred in 1998 I county county wheat yield 254.6kg, compared with the average annual reduction of 120kg, waterlogging is the main factor in its production.Analysis of the causes of soil damage are as follows: 1 weather conditions: After spring, the days of rainy days were 47 days, accounting for one third of the growth period of wheat in spring. The total rainfall during this period was 416.4mm, 209.2mm more than that of the normal year, of which 365.5mm in March-June was double that of the same period of previous year At this point in our county wheat mid and late growth stage, poor resistance to stains.2 cultivation techniques and management measures are not in place: ①The ditch system is not complete, according to the survey in 1998 three wheat ditch line supporting better than 1 / 3, poor supporting system is the main man-made soil injury factors.