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采用每株施入供氮(N)量为36.36或18.18 mg的缓释肥,并增施0或1.82 g FM有机肥的2×2析因设计,对长白落叶松容器幼苗施肥效果进行研究.结果表明:施肥处理对苗高、地径、生物量和钾(K)的吸收均无显著影响.增施有机肥显著提高了长度>1 cm的一级侧根数量(P=0.040)、主根长(TRL,P=0.012)和主根长与苗高比(P=0.008).高量缓释肥处理下,苗木根N浓度(P=0.035)以及苗干(P=0.005)、根(P=0.037)和苗干+根(P=0.030)中N含量以及苗干中磷(P)含量(P=0.047)均高于低量缓释肥处理;高量缓释肥处理下,增施有机肥使叶片和苗干+根中N浓度提高了137%(P=0.040)和21%(P=0.013);增施有机肥提高了苗干(P=0.020)、根(P=0.017)和苗干+根(P=0.013)中N浓度.经矢量养分分析,高量缓释肥供给可引起苗体N、P的过量,增施有机肥能明显克服N、P的缺乏,但导致K的损耗.对长白落叶松播种苗的培育,建议采用每株供氮18 mg的缓释肥并配施1.82g FM有机肥的施肥方法.
Larix olgensis container seedlings were fertilized with 2 × 2 factorial design using 0, 1.82 g FM organic fertilizer per plant for slow-release fertilizer with 36.36 or 18.18 mg N applied. The results showed that fertilizer application had no significant effect on seedling height, diameter, biomass and K uptake (P = 0.040), the number of primary root length> 1 cm (P = 0.008). The root N concentration (P = 0.035) and seedling stem (P = 0.005) and root (P = (P = 0.047) and seedling stems + roots (P = 0.030) and phosphorus (P) content in seedling stems (P = 0.047) Fertilizer increased 137% (P = 0.040) and 21% (P = 0.013) of N in leaves and seedling stems and roots, increased seedling stems (P = 0.020) and roots N concentration in seedling root + root (P = 0.013) .After the nutrient vector analysis, the high N and P supply could cause excessive N and P in the seedling, and the organic fertilizer could obviously overcome the deficiency of N and P, Of the growth of Larix sibirus sowing cultivation, it is recommended to use each plant for 18 mg of nitrogen and slow release fertilizer 1.8 2g FM fertilizer application methods.