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Study on Ginseng Soil Major Nutrients and Enzyme Activity

Author: SunHai
Tutor: ZhangYaYu
School: Chinese Academy of Agricultural Sciences
Course: Medicinal plant resources school
Keywords: Farmland planted ginseng Forest Senate Soil nutrients Soil enzymes Canonical correlation analysis
CLC: S567.51
Type: Master's thesis
Year: 2010
Downloads: 198
Quote: 0
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Abstract

Soil fertility status of plants grow well, the soil nutrient directly reflects the soil fertility, soil enzyme activity characterization of soil fertility in key biological activity indicators. In this paper, different years old the farmland planted parameters and understory the ginseng root zone soil experimental material analysis of soil nutrient content and activity status, in order to understand the the two production mode ginseng root zone soil nutrients and the activity trend and accurate evaluation of both soil fertility status for the farmland planted parameters of soil improvement and forest Senate health care sterile theoretical basis. The main contents are as follows: 1. Analysis using conventional agricultural analysis ginseng soil nutrients, the results show that the two production mode ginseng soil nutrient content and different pH values, the same nutrients forest Senate soil content above the farmland planted ginseng soil organic matter, soil NPK and soil pH affect each other. The farmland planted ginseng and forest Senate soil organic matter, total N and P content are surface gt; root layer gt; quite different underlying different levels of total K content. Ginseng root layer soil analysis and extend with ginseng growing years, the farmland planted participate in organic matter and total N content decreased, total P and available NPK was the \total P content increased year by year, total K content is maintained at a constant level, available NPK increased year by year; changes in soil pH in the range of ginseng for optimum growth, but the two production mode root layer soil pH trend of farmland planted ginseng root layer soil pH of a declining trend, the 4-year-old a pH as low as 5.17; Ginseng root layer soil pH increased year by year, the 25-year-old is up to 6.36; correlation analysis showed that ginseng soil nutrient elements: nutrients between mutual influence, especially organic matter content significantly affect the content and form of other nutrient elements in the soil. 2. Reduce the amount and the amount of product formation by the substrate of the enzymatic reaction measurement of soil enzyme activity, the results show that the high and low activity of the two production mode ginseng root zone soil, the same enzyme in the forest Senate soil the farmland planted parameters soil in more than doubled. The two modes of production root zone soil Most of the activity of the vertical distribution of surface gt; root layer gt; underlying soil enzyme activity than the control soil and plant parameters. Catalase, invertase and phosphatase activity with the ginseng farmland planted ginseng root layer of soil over the growth of an inverted \16.695 mg / g · d-1 and 8.307 mg / g · d-1, urease activity was \was \phosphatase activity significantly correlated. 3. Use of canonical correlation analysis of ginseng soil nutrient and soil enzyme analysis, a clear key nutrients and enzyme activity of both soil fertility and trace elements with the activity of the mechanism of action. The results show that the farmland planted participate in the first canonical variables of the soil organic matter of NPK element content and Zn elements and soil phosphatase, invertase and the level of activity of hydrogen peroxide is closely related, Zn promote the activity of two cumulative contribution rate 74.2%; forest Senate soil, the first canonical correlation variable soil organic matter, total P, available K content and the content of Fe in the soil phosphatase, urease, sucrase and peroxide catalase activity level of relationship, Fe enzyme activity was inhibited cumulative contribution rate of 54.5%; the two sterile ginseng canonical variables Sort figure shows the growth extends down year by year with ginseng, soil nutrients and soil enzyme activities sharp decline. Soil enzyme activity can accurately reflect the condition of soil nutrient supply, combined with soil organic matter, NPK and pH can the accurate evaluation ginseng soil fertility status. Farmland planted ginseng soil improvement and forest Senate health care infertility should be a composite to consider ginseng soil nutrients and soil enzyme activity, soil fertility status adjusted by adjusting the soil nutrients, the C / N ratio and the metal element content.

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