根施氮素对油茶一年生容器苗春梢生长的影响研究

Research for Effects of Growth of Spring Shoots of N Fertilizer Treatment in the Roots for Camellia oleifera Annual Container Seedlings

摘要:

本研究以油茶一年生容器苗为试材，研究了根施不同质量分数尿素对其生长的影响。试验共设 8 个处理。即：处理 1 (1500 mg/L)；处理 2 (2500 mg/L)；处理 3 (3500 mg/L)；处理 4 (4500 mg/L)；处理 5 (5500 mg/L)；处理 6 (6500 mg/L)；处理 7 (7500 mg/L)；对照组 (清水)。试验结果表明：处理 5 处理后新梢生长长度最长，平均为 51.7 mm；处理 4 处理后的容器苗的根颈粗度、抽稍数数值皆为最大，但处理 4 与处理 5 在抽稍数量这个指标上无显著差异；处理 1 处理后的容器苗在新稍叶片数量上大于其他处理，平均为 3.1，但与处理 5、处理 2 无极显著差异；处理 7 在新梢长度，根颈粗度，抽稍数三个生长指标上表现的效果最差，说明过高浓度的尿素对油茶容器苗生长不利；清水对照组中，油茶容器苗根颈粗度数值低于其他 7 个处理组。就 8 个处理对根颈粗度的影响来看，处理 4 与处理 1、2、3、5、6、7、8 间呈极显著差异，而其余各处理两两间无极显著差异。综合本研究的实验分析结果，由于 8 个处理的新梢叶片数，根颈粗度，抽稍数差异不大，主要考虑新稍长度这一因素。因此，在油茶容器苗培育过程中，以浓度为 5500 mg/L 的尿素为较好的施肥选择。

Abstract:

In this experiment, the Camellia oleifera Abel.container seedlings were used to study the root application of different mass fraction of urea on its growth.this test sets eight treatments, namely:1500 mg/L urea;2500 mg/L urea;3500 mg/L urea;4500 mg/L urea;5500 mg/L urea;6500 mg/L urea;7500 mg/L urea;water contrast.And the experiment shows that treatments five can stimulate the young branches grow longer, the average growth is 51.7 mm;treatments four can make the thickness of collar and the shooting number the biggest, but there are no significant difference on the shooting numbers in treatments four and treatments five;in Processing one, the numbers of the young sprouts are more than others, the average is 3.1, but compared to treatments five and treatments two, there is no big difference;the length of the young branches, the thickness of the collar and the shooting numbers of the container seeding in treatments seven perform the worst, it indicates that the high density of the urea is not benefit to the growth of the container seedling.In Water Contrast, the thickness of the collar in the container seedling is lower than other seven treatments.The influence of eight treatments on the thickness of the collar, treatments four shows extremely difference than treatments one, treatments two, treatments three, treatments four, treatments five, treatments six, treatments seven and treatments eight, but there is no huge difference between the contrast of any other two treatments.The comprehensive experimental results show that, according to the number of the young branches, the thickness of the collar and the shooting numbers have slight differences in the eight treatments, so we mainly concentrate on the length of the young branches.Therefore, in the process of the growth of the container seedling, the mass fraction of 5500 mg/L urea is the best choice of fertilizing.