三倍体毛白杨、苦楝、楸树施用膨化污泥杨树专用肥的效果

目的]探讨城市污泥在绿化苗木上的施用效果。方法]以膨化污泥为载体生产了杨树专用肥,研究其在三倍体毛白杨、苦楝、楸树上的施用效果。结果]施杨树专用肥处理的苦楝胸径、树高、材积平均增加值分别为2.37 cm1、.320 m0、.031 8 m3,分别比不施肥处理增加21.54%、28.16%3、5.32%。施杨树专用肥处理的三倍体毛白杨平均苗高、地径分别为291.202、.56 cm,分别比施尿素处理增加11.36%1、0.34%。施杨树专用肥处理的楸树树高、地径最大,分别比不施肥处理增加43.75%和17.07%;试验地的土壤有机质含量与试验前增加了2.8 g/kg,0.25~1,1~5,>5 mm水稳性团粒分别比不施肥处理增加29.1%、33.2%、23.7%。结论]杨树专用肥可作为绿化苗木的追施肥料,应大力推广。

Stndy on the Application Effects of the Special Fertilizer Expanded for Poplar Tree on Triploid Chinese White Poplar,Melia azedarach L.and Catalpa bungei

Objective] The aim of the research was to discuss the application effect of urban sludge on greening seedlings.Method] The special fertilizer for poplar was produced by using expanded sludge as carrier.Its application effects on triploid Chinese white poplar,Melia azedarach L.and Catalpa bungei were studied.Result] The average increasing value of breast diameter,tree height and wood volume of M.azedarach treated by the special fertilizer for poplar were 2.37 cm,1.320 m and 0.031 8 m3 resp.,increasing by 21.54%,28.16% and 35.32% than that of no fertilizer application.The average seedling height and ground diameter of triploid Chinese white poplar treated by the special fertilizer for poplar were 291.20 and 2.56 cm resp.,increasing by 11.36% and 10.34% resp.than that of applying urea.The tree height and ground diameter of C.bungei treated by the special fertilizer for poplar were greatest,increasing by 43.75% and 17.07% resp.than that of no fertilizer application.The organic matter content of soil in the experimental field was increased 2.8 g/kg than that before the experiment.The water stable granular with the size of more than 0.25-1,1-5,>5 mm were increased by 29.1%,33.2% and 23.7% than that of no fertilizer application resp.Conclusion] The special fertilizer for poplar could be taken as the topdressing fertilizer of greening seelings and it should be promptly popularized.