一、前言小麦粒重是构成小麦产量的三个因素之一。多年的生产实践表明,提高小麦千粒重或使小麦千粒重稳定在本品种的应有水平很不容易。气候条件的千变万化,栽培措施得当与否,使千粒重忽高忽低,极不稳定,严重地影响小麦高产、稳产。 1979年豫北地区小麦千粒重普遍降低4—5克,大家认为是干热风的危害,但1976年小麦成熟期干热风并不明显,而千粒重降低幅度却更大,尤其是高产田块比较突出,以郑引一号小麦为例,只有34—35克,比正常的粒重要低3—4克,显然是由于肥水措 I. INTRODUCTION Wheat grain weight is one of the three factors that make up wheat yield. Years of production practice shows that it is not easy to increase the 1000-grain weight of wheat or to stabilize the 1000-grain weight of wheat in this variety. The ever-changing climatic conditions and appropriate cultivation measures make the grain weight of the valley one of the highest and lowest in the world, which is extremely unstable and seriously affects the high yield and stable yield of wheat. In 1979, the wheat grain weight in the north of Henan generally dropped 4-5 grams, which we think is the harm of the dry and hot wind. However, the dry-hot wind in 1976 is not obvious, but the 1000-grain weight reduction is even greater, especially the high- Take Zheng cited wheat as an example, only 34-35 grams, 3-4 grams lower than the normal grain weight, apparently due to fertilizer measures