元宝槭幼树施肥研究 Ⅰ.不同施肥处理对生长与构型的影响

Studies on Fertilization of Young Acer truncatum Bunge Ⅰ. Effect of Various Nutrition Supply Conditions on Growth and Morphology of Acer truncatum Bunge

在云南省禄丰县进行元宝槭幼树施肥试验,比较9个不同施肥配方对2年生元宝槭植株大小、分枝格局、叶特性和生物量的影响。研究结果表明:不同施肥处理导致的营养差异对元宝槭的构型造成显著影响,进而对元宝槭的生长与生物量积累、分配产生不同的影响,应根据经营目的选择适当的施肥方案。N0P250K75是培育园林绿化树的最好施肥配方,其地径、株高和冠幅分别为2 85cm、1 26m和0 59m2,分别比对照增加34 26%、51 66%和140 23%。N0P125K37 5是营建叶用林的最佳施肥配方,其总生物量、根、茎、叶的生物量干质量分别为438g、192g、159g、88g,分别比对照高出83 42%、60 10%、98 13%、113 44%;根冠生物量为0 81比对照减少18 30%。

Trails on the effects of various nutrition supply conditions on Acer truncatum were conducted. The size of plant, branching pattern and biomass of 2 years old A. truncatum under 9 different treatments were measured and analyzed. The result showed that the different nutrition supply conditions significantly affected the architecture of A. truncatum. This leaded to significant different on growth, biomass and distribution of A. truncatum . Fertilization treatments should be selected by cultivation aims. The treatment N_0P_(250)K_(75) was the best for horticulture tree cultivation with basal diameter of 2.85 cm, height of 1.26 m, crown of 0.59 m^2, which were respectively 34.26%、51.66% and 140.23% higher than that of non-fertilizing treatment. The treatment N_0P_(125)K_(37.5) was the best for foliage-usage forest cultivation with total biomass dry weight of 438 g, root biomass dry weight of 192 g, stem and branch biomass dry weight of 159 g, leaf biomass dry weight of 88 g, which were respectively (83.42%)、60.10%、98.13% and 113.44% higher than that of non-fertilizing treatment. Its root/shoot biomass dry weight was (0.81), which was 18.30% less than that of non-fertilizing treatment.