滨海涂地红楠黄化的研究

采用土壤植物化学分析、酶学诊断和田间试验对舟山市朱家尖苗木基地盐碱地土壤红楠黄化成因进行了研究。结果表明:舟山市朱家尖苗木基地红楠黄化是由于基地土壤呈碱性,致使土壤中缺少有效态铁,影响了根系对铁的吸收和铁在树体内的移动及有效性,不能满足红楠正常生长对铁的需要而引起的缺绿黄化症。

A Causal Diagnosis of the Yellows of Machilus thunbergii

A causal diagnosis is conducted on the yellows of Machilus thunbergii by means of the soil-plant chemical analysis,enzyme diagnosis,and field experiments,which grow in the saline-alkali soil at Zhujiajian Nursery Stock Base.The study reveals that the infected soil is of high pH value and low effective iron content and the afore-said infected trees and plants suffer from a deficiency of iron for their normal growth,as the alkali soil is lack of effective iron,and the insufficiency in turn weakens the rhizome of the trees to absorb iron effectively and impedes the movement of iron along the trunk and branches.