氮磷钾对俄罗斯大果沙棘扦插苗生长效应的影响

Effect of N,P and K on the Growth of Nursery Seedlings of Hippophae rhamnoide from Russia

采用肥料效应回归分析试验设计,研究了N、P、K 3种营养元素对俄罗斯大果沙棘嫩枝扦插苗苗高和地径生长的影响,建立了回归模型。结果表明:施肥对苗木的生长有显著的促进作用,3种营养元素中,N对于苗高和地径的影响最大;3种营养元素对苗木的生长有交互影响,N和P、N和K对苗高和地径的交互影响较大。俄罗斯大果沙棘嫩枝扦插苗N、P、K的最适施用量为253.8～303.17、153.23～194.57、140.13～144.28 kg.hm-2。

An orthogonal regression design with three factors （N ,P and K） and five levels was adopted to investigate the effect N ,P and K fertilizers on growth of nursery stocks of Hippophae rhamnoide from Russia through building models to demostrate the relations of fertilization and growth. The results showed that N fertilizer was the most important factor on height and diameter growth of nursery stocks ;there was significant interaction between the N and P, N and K; the best combination of N,P and K fertilizers on growth of nursery stocks of H. rhamnoide from Russia was N. 253. 8-303. 17 kg/hm^2,P： 153. 23-194. 57 kg/ hm^2,K： 140. 13-144. 28 kg/hm^2.