稀土与氮磷钾配合施肥对油茶幼林生长与结果的影响

以油茶为试验材料,采用正交试验方法,分析不同浓度稀土微肥与N、P、K肥配合施用对油茶株高、冠幅、单株产量和单果重的影响。结果表明,当N肥用量较低、P肥与稀土微肥施用量均较高时,不利于油茶生长和产量的提高;处理4(N肥120 g·株~(-1)、P肥45 g·株~(-1)、K肥85 g·株~(-1)、稀土微肥300 mg·L~(-1))和处理7(N肥170 g·株~(-1)、P肥45 g·株~(-1)、K肥120 g·株~(-1)、稀土微肥200 mg·L~(-1))的油茶长势及产量均较高,且优于对照处理,反映了稀土微肥与适量的N、P、K肥配合施用对油茶生长和产量提高具有促进作用,但单独施用稀土微肥不能达到良好肥效。以此确定,以处理4和处理7为较佳的稀土微肥与N、P、K肥配合使用量。

Effect of combined rare earth micro fertilizer and macronutrients on the growth and fruits of Camellia oleifera saplings

Using Camellia oleifera as test material, an orthogonal experiment was performed to analyze the effects of different concentrations of rare earth micro-fertilizer and NPK fertilizer on plant height, crown width, yield per plant, and single fruit weight of C. oleifera. The results showed that low amount of N fertilizer in combination with high amount of P fertilizer and rare earth micro-fertilizer was not conducive to the growth and yield of C. oleifera. The growth and yields under treatment 4 (120 g of N, 45 g of P, and 85 g of K per plant along with 300 mg·L-1 rare earth micro-fertilizer) and treatment 7 (170 g of N, 45 g of P, and 120 g of K per plant along with 200 mg·L-1 rare earth micro fertilizer) were superior than the control values. These results reflect that the combination of rare earth micro-fertilizer and proper amounts of NPK fertilizer can promote the growth and yield of C. oleifera. The application of rare earth micro-fertilizer alone could not provide good fertilizer efficiency. Treatments 4 and 7 were the best combinations of rare earth micro-fertilizer and NPK fertilizer.