论文部分内容阅读
一、小麦对氮磷钾养分的吸收特点小麦生长发育可分为三个阶段,即营养生长阶段,营养生长和生殖生长并进阶段,生殖生长阶段。不同生育阶段,小麦对氮、磷、钾养分吸收数量也不相同。研究表明,小麦一生对养分的吸收有两个高峰期,一是越冬前,二是拔节至孕穗期。越冬前吸收氮、磷、钾养分量分别占总量的19.4%、19.0%和14.2%。越冬至返青期分别为16.1%、16.7%和15.1%。从拔节至孕穗进入高峰,所需氮、磷、钾吸收量分别占总量的32%、38.5%和
First, wheat N, P and K nutrient absorption characteristics Wheat growth and development can be divided into three stages, namely vegetative growth stage, vegetative and reproductive growth and advanced stage, reproductive growth stage. Different stages of fertility, wheat nitrogen, phosphorus and potassium absorption of nutrients is not the same. Studies have shown that the absorption of nutrients throughout the wheat life has two peaks, one before the winter, the second is the jointing booting stage. Before winter, nitrogen, phosphorus and potassium absorption accounted for 19.4%, 19.0% and 14.2% of the total respectively. Overwintering and returning to youth were 16.1%, 16.7% and 15.1% respectively. From jointing to booting peak, the required nitrogen, phosphorus and potassium uptake accounted for 32% and 38.5% respectively of the total