近两年我省小麦单产大幅度下降,川西平原部分县的问题尤为突出,以崇庆县为例,1988、1989年小麦单产下降到293、273公斤,分别比1987年降低28.5、47公斤,减产8.86％、15.09％。分析减产原因,找出对策尽快改变这一局面,十分重要。一、小麦主要品种的产量构成情况 1、有效穗:1989年亩平21.69万,比1988年减少0.2万,降低0.91％;比1987年减少0.56万,降低2.6％。 2、穗粒数:1989年平均每穗着粒数为31.5粒,比1988年减少3.4粒,降低9.74％;比1987年减少3.2粒,降低9.22％。 In the past two years, the yield of wheat in our province has dropped sharply. The problems in some counties of western Sichuan plain are particularly prominent. Taking Chongqing County as an example, the wheat yields in 1988 and 1989 dropped to 293,273 kg, down 28.5 and 47 kg respectively from 1987, Cut 8.86%, 15.09%. It is very important to analyze the causes of the reduction and find out the measures to change the situation as soon as possible. First, the main varieties of wheat production structure 1, the effective panicle: 216 acres in 1989 216,900, compared with 1988 decreased by 0.2 million, down 0.91%; less than 05,600 in 1987, down 2.6%. 2. Number of grains per spike: In 1989, the average number of grains per panicle was 31.5, a decrease of 3.4 grains or 9.74% from that of 1988; a decrease of 3.2 grains or 9.22% from 1987.