【摘要】 采用氮、磷、钾3因素3水平施肥正交试验,研究氮磷钾施肥配比对中华楠苗木生长的影响,为中华楠苗木培育提供理论基础。结果表明:(1)不同氮磷钾施肥配比对中华楠苗木各项指标均存在显著影响。223处理(尿素10 g+过磷酸钙20 g+氯化钾6 g)对苗木生长的促进作用最大,苗木质量指数最高,为最优施肥处理。其苗高年生长量、地径年生长量、冠幅年生长量、叶生物量、枝干生物量、根生物量以及总生物量分别是对照组的227.10%、200.00%、226.96%、235.35%、169.88%、171.00%和183.80%。(2)各处理的苗木质量指数从好到差排序为:223处理(尿素10 g+过磷酸钙20 g+氯化钾6 g)> 122处理(尿素5 g+过磷酸钙20 g+氯化钾4 g)> 231处理(尿素10 g+过磷酸钙30 g+氯化钾2 g)> 133处理(尿素5 g+过磷酸钙30 g+氯化钾6 g)> 313处理(尿素15 g+过磷酸钙10 g+氯化钾6 g)> 321处理(尿素10 g+过磷酸钙20 g+氯化钾6 g)> 332处理(尿素10 g+过磷酸钙20 g+氯化钾6 g)> 212处理(尿素10 g+过磷酸钙10 g+氯化钾4 g)> 111处理(尿素5g+过磷酸钙10 g+氯化钾2 g)> CK。(3)中华楠苗木施肥管理必须遵循适需的原则,氮肥不宜过高,可适当增施磷肥和钾肥。更多还原

【Abstract】 The orthogonal design experiment of N,P,K fertilization with 3 factors and 3 levels was adopted.Studying the effects of fertilization with different ratio of N,P,K on growth of Machilus chinensis seedlings,so as to provide a theoretical basis for seedling cultivation of M.chinensis.(1) All the ratio fertilization of N,P,K had significant impact on the growth index of M.chinensis seedlings.The 223 dispose (carbamide 10 g+superphosphate 20 g+potassium chloride 6 g) had the maximum auxo-action.And the quality index number of seedling is the highest.so it’s the optimum dispose.The seedling height annual growth,ground diameter annual growth,crown breadth annual growth,leaf biomass,stem biomass,root biomass and total biomass were separately227.10%,00.00%,226.96%,235.35%,169.88%,171.00%,183.80%,compared with the matched group.(2) The order of seedling quality index of each treatment was:223 (carbamide 10 g+superphosphate 20 g+potassium chloride 6 g)>122 (carbamide 5 g+superphosphate 20 g+potassium chloride 4 g)>231 (carbamide 10 g+superphosphate 30 g+potassium chloride 2 g)>133 (carbamide 5 g+superphosphate 30 g+potassium chloride 6g)>313 (carbamide 15 g+superphosphate 10 g+potassium chloride 6 g)>321 (carbamide 15 g+superphosphate 20 g+potassium chloride 2 g)>332 (carbamide 15 g+superphosphate 30 g+potassium chloride 4 g)>212 (carbamide 10 g+superphosphate 10 g+potassium chloride 4 g)>111 (carbamide 5 g+superphosphate 10g+potassium chloride 2 g)>CK.(3) Fertilization management of M.chinensis seedlings must follow the principle of suitable demand.N should not be too high,P and K can be increased appropriately.更多还原