小麦倒伏的主要因素,在生长前期和生长后期是不同的。据我们的了解,小麦在早期倒伏常因密度过大而引起的。而小麦在拔节至齐穗期以后的倒伏则常由于氮肥水平过高所造成。为了从数量上确定养分水平与倒伏的相关性,我们在小 The main factors of wheat lodging, in the early growth and late growth are different. According to our understanding, the early lodging of wheat is often caused by excessive density. The lodging of wheat after jointing to heading stage is often caused by the high level of nitrogen fertilizer. In order to quantitatively determine the relevance of nutrient levels to lodging, we are small