论文部分内容阅读
合阳县地处渭北旱原,海拔800米左右,年降水量550毫米,年平均气温11.5℃,无霜期190天。耕地110万亩,95％以上是旱地。小麦面积54万亩,人均1.5亩。1974—82年9年中,小麦平均单产251.8斤,有两年突破300斤,最高的一年达327.3斤,在长期的旱作实践中,我县积累了一些经验,本文仅就群体结构问题谈以下认识: 一、冬前小群体是旱地小麦高产稳产的重要标志近年,旱地小麦产量提高到300—400斤,
Heyang County is located in Weibei drylands, about 800 meters above sea level, the annual rainfall of 550 mm, the annual average temperature of 11.5 ℃, frost-free period of 190 days. 110 million mu of arable land, more than 95% of dry land. Wheat area of 54 mu, 1.5 mu per capita. During the nine years of 1982-82, the average yield of wheat was 251.8 kg, which exceeded 300 kg in two years and reached 327.3 kg in the highest year. In the long-term practice of dry farming, our county has accumulated some experience. This article only deals with group structure problems Talk about the following understanding: First, a small group before winter is an important symbol of high and stable yield of wheat in dry land In recent years, dryland wheat production increased to 300-400 pounds,