摘要
通过对盆栽苜蓿实施不同的施肥处理,研究施肥对紫花苜蓿产量和营养吸收规律的影响。对苜蓿3年的产量进行分析可知苜蓿产量与年限呈指数函数y=18.4596e0.4359x,R=0.9984增长;通过建立磷、钾肥与产量的回归方程,预测每盆施重过磷酸钙5.089 g,硫酸钾2.584 g,产量最高为每盆36.734 g;当苜蓿产量最高时,其体内氮、磷、钾含量N∶P2O5∶K2O=1∶0.264∶1.434。对3年生苜蓿氮、磷、钾的吸收量进行分析,建立磷、钾肥与氮吸收的吸收曲线方程,预测每盆吸收重过磷酸钙4.452 g,硫酸钾2.365 g,氮吸收量最高1.156 g;同时还建立磷、钾肥与磷吸收的吸收曲线方程,预测出每盆吸收重过磷酸钙5.990 g,硫酸钾4.354 g,磷吸收量最高0.124 g。
By experimenting with different amount of the fertilizer on alfalfa, research on the effect of fertilizer on alfalfa yield and nutrition absorption was made in this experiment. Based on three-year-yield of the alfalfa,a fertilizer response function, its optimum fertilization can be obtained. Phosphorus fertilizer 5.089 g/pot,potassium fertilizer 2. 584 g/pot and the yield have been promoting for three years with the function y = 18. 4596e^0.4359x,R=0. 9984s When alfalfa reaches the highest yield, optimum ratio of component is N：P2O5; K2O is 1 ： 0. 264 ： 1. 434. The conclusions about absorption rules of N and P are drawn after statistical analysis on three-year-absorption of alfalfa： The fertilizer response function of the nutrition absorption of nitrogen, its optimum fertilization： Absorption of Phosphorus fertilizer is 4. 452 g/pot, potassium fertilizer is 2. 365 g/pots The absorption of nitrogen is 1. 156 g/pots At the same time,the curve equation of phosphorus and potassic fertilizer, and nitrogen absorption was established. It was forecasted that absorption of phosphorus fertilizer was 5. 990 g/pot, potassium fertilizer 4. 354 g/pot, the absorption of phosphorus is 0. 124 g/pot.
出处
《新疆农业大学学报》
CAS
2005年第4期24-27,共4页
Journal of Xinjiang Agricultural University
基金
新疆科技厅"十五"重点攻关项目(200231107)
