温郁金的石灰土栽培及其营养元素动态变化初步研究

为探索原产浙江温州地区的药用植物温郁金是否能在石灰土上生长,通过盆栽试验对比研究了温郁金在石灰土和红壤上生长及其生长过程中N、P、K、Ca、Mg、Fe 6种元素含量的动态变化。结果表明:温郁金不但可以在石灰土上生长,而且其药用部位(莪术之一)的产量、莪术油的含量及莪术油中主要药用组分β-榄香稀等的含量都较大;石灰土上生长的温郁金在生长前期较快地表现出老叶明显发黄的缺肥症状,而红壤植株在追加N、P、K 3种大量元素后功能叶子呈现黄白色,且夹带有褐色斑点的缺肥症状;石灰土中Fe元素有效态含量比红壤低一个数量级,但在石灰土上种植的温郁金植株其Fe元素含量并不比红壤上的低。由此认为:(1)温郁金基本可以在石灰土上引种栽培;石灰土种植温郁金对施加化肥诱发的土壤元素缺乏具有较强的抵抗性;(2)温郁金元素的吸收受地质背景制约。

Preliminary study on the planting of C. wenyuj in andthe regime of nutrients content in lime soil

To explore whether C.wenyujin from Wenzhou,Zhejiang province can grow in lime soil normally or not,it is studied for the regime of N,P,K,Ca,Mg,Fe content during the growth process of C.wenyujin through parallel trials in lime soil and red soil.The results show that not only the growth of C.wenyujin in lime soil is possible,but also the biomass,yield of medicinal part,the content of oil from the tuber and its medicinal components are higher than those from red soil.The C.wenyujin from lime soil quickly assumes etiolation during initial growth period.Surprisingly,the lusty leafs of C.wenyujin planted in red soil turn to pale and brown flecks occur in the leafs with the fertilization of N,P,K.It is concluded that C.wenyujin can be planted in lime soil;C.wenyujin planted in lime soil has more resistance to the nutrition deficiency owing to chemical fertilizer application;the assimilation and circulation of nutrientis in C.wenyujin are controlled by geological background.