我县从1977年开始推广玉米、小麦2:1和3:1间套作的栽培形式。1983年玉米、小麦3:1(3垄玉米1垄小麦)间套作发展到27万亩,占粮谷总面积的23%,已成为我县的一种重要的栽培形式。虽然玉米、小麦间套作按混合面积计算,亩产相当于或略低于清种玉米,但却增加了细粮,产值可与清种玉米相等或略高,因而受到广大农民的欢迎。总结几年来的生产实践,我们认为提高玉米、小麦间套作产量的关键措施在于: My county since 1977 to promote corn, wheat 2: 1 and 3: 1 intercropping forms of cultivation. In 1983, maize and wheat 3: 1 (3 ridge maize 1 ridge wheat) intercropping developed to 27 acres, accounting for 23% of the total grain valley, has become an important form of cultivation in our county. Although corn and wheat intercropping were calculated on a mixed area, the yield per mu is equivalent to or slightly lower than that of freshly planted corn, but the fine grain is added and the output value can be equal to or slightly higher than that of purebred corn. Therefore, it is welcomed by farmers. Summing up the past few years of production practices, we think the key measures to increase the yield of maize and wheat are: