论文部分内容阅读
兰考泡桐在我县进入农田后,普遍出现一年活、二年死的现象,其死亡的原因,虽然很复杂,但苗木质量低是死亡的主要原因。近二年内我们做了泡桐壮苗培育实验和栽植后的生长量调查,现将实验调查结果列表说明。实验调查结果分析:1、培育泡桐壮苗应提倡当年育苗当年出圃的二当育苗法。从表1可看出,一年生埋根苗只要肥水跟上去,育苗密度合理,当年苗高达到3.5米以上是不成问题的,以干径比为衡量壮苗的依据,凡干径比在70—80之间的为壮苗,70以下者为极壮苗,80以上者为弱苗。那么,一
After entering the farmland in our county, Lantana camaldulensis commonly occurs for one year and dies for two years. The cause of death is very complicated, but the low quality of seedlings is the main cause of death. In the past two years, we have done Paulownia seedling cultivation experiments and growth after planting survey, the experimental findings are tabulated. Analysis of experimental findings: 1, nurturing Paulownia seedlings should be promoted when nursery nursery two nursery law. As can be seen from Table 1, as long as the annual seedlings buried fertilizer to keep up with water, nursery density is reasonable, when the seedling height of 3.5 meters or more is not a problem, the ratio of dry weight to measure strong seedling basis, where the dry diameter than 70-80 Between the strong seedlings, 70 below are very strong seedlings, more than 80 for the weak seedlings. Well, one