小麦产量是由穗数、粒数和粒重决定的,选择增产途径、研究增产措施,也必须围绕这三个问题。但三者不是孤立存在的,有互相制约,互相促进的密切联系。在单位面积上,穗数越多,往往粒数就少,这种现象说明三者存在着矛盾。但这种矛盾经人为的努力,可以使之变小,使三者比较协调。从我们县几个产量指标看三者关系:亩产千斤田,每亩穗数45万左右,每穗35粒,千粒重40克;亩产800斤的,每亩穗数40万左右,每穗30粒,千粒重34克;亩产600斤的,每亩穗数30万左右,每穗30粒,千粒重33克;亩产400斤的,每亩穗数20万左 Wheat yield is determined by the number of spikes, grain number and grain weight. Choosing the means of increasing production and studying the measures of increasing production must also focus on these three issues. However, the three do not exist in isolation and have close ties with each other and with each other. In the unit area, the more spikes, often fewer grains, this phenomenon shows that there is a contradiction between the three. However, this contradiction can be made smaller by man-made efforts to make the three more coordinated. From the output of several indicators of our county to see the relationship between the three: kilograms per mu yield field, per acre 450000, 35 per panicle, grain weight 40 grams; 800 kg per mu, 400,000 per acre spike, spike 30 grains, grain weight 34 grams; per kilogram of 600 pounds, the number of spike per acre 300,000, 30 per panicle, grain weight 33 grams; 400 kg per mu, 200,000 per acre spike