土壤改良剂对紫花苜蓿生长性状的影响

Effects of Soil Conditioner on Growth Traits of Medicago sativa L.

[目的]探索适宜的土壤改良剂添加量,从而提高紫花苜蓿生长和产量。[方法]在紫花苜蓿返青期设置6种施肥处理:单施土壤改良剂、3种不同剂量的土壤改良剂和磷钾肥混合物、单施磷钾肥和无添加,测定不同处理对紫花苜蓿的生长速度、株高、节间数、节间距及产量的影响。[结果]在试验条件下,与不施肥对照相比,单施土壤改良剂和施磷钾肥及磷钾肥与土壤改良剂配施均能不同程度增加紫花苜蓿的各个性状及产量。[结论]施肥比例在JPK0.3 (改良剂0.3 kg/m^2,P肥0.033 5 kg/m^2,K肥0.013 35 kg/m^2)的样方对于紫花苜蓿的生长速度、株高、节间数、节间距及产量上有较明显的促进作用。

[Objective]To find out the suitable doses of soil conditioner,for increasing the growth of alfalfa.[Methods]In this experiment there was five treatments,only soil conditioner,three different doses of soil conditioner with phosphatic and potassic fertilizer,only P-K fertilizer,and blank control.Then growth race,plant height,internode number,internode length and yield.[Result]Compared to blank control,no matter the soil conditioner with or without the phosphatic and potassic fertilizer,could improve the traits and yield of the alfalfa.[Conclusion]JPK0.3(0.3 kg/m^2 soil conditioner,0.033 5 kg/m^2 phosphatic fertilizer,0.013 35 kg/m^2 potassic fertilizer)had obvious improvement on growth traits of alfalfa.