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Suitability Evaluation of Cultivated Land Resources for Tea Cultivation Based on GIS in Mingshan

Author: LiRui
Tutor: CaiYan
School: Sichuan Agricultural University
Course: Utilization of Agricultural Resources
Keywords: tea suitability evaluation cultivated land
CLC: S158.3
Type: Master's thesis
Year: 2012
Downloads: 19
Quote: 0
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Abstract


Tea is a healthy favored beverage in the world. The soil is the base of the growth and development for the tea tree, tea plant nutrients and moisture from the soil, so the soil texture, soil nutrients and altitude, slope, and other site conditions have a very important role in the growth of tea. With the invention of the computer and geographic information system technology application, GIS technology is used in the wide range of crops, fruit trees and forest land evaluation. Mingshan is known as "fairy tea’s hometown", in the majority of tea garden the unreasonable application of chemical fertilizers, nutrients imbalance is widespread, leading to decline in soil quality, economic decline and other issues. Tea land evaluation based on GIS technology in Mingshan arable has important practical production significance.Collected Mingshan administrative map, land use maps and soil maps, then superimposed them to form polygons as evaluation unit, and completed the assignment of values to evaluation unit. Screened eight evaluation factors which had greater impact on the growth of tea.At the same time, determined the corresponding membership degree and weight, evaluated the suitability of cultivated land resources for tea cultivation in Mingshan by using the GIS technology. The main results were as follows.(1) Eight factors of filter altitude, slope, the pH, texture, organic matter, alkali-hydrolyzable nitrogen, available phosphorus and rapidly available potassium were screened which are greater effect on tea planting. On this basis, calculated the cultivated land suitability evaluation of tea plant index, used the cumulative curve method to divide cultivated land in Mingshan into five levels, none of them was entirely unsuitable areas, the distribution of the total area cultivated land in highly suitable, suitable, medium suitable, barely suitable proportion was0.07%,73.37%,26.52%and0.04%respectively. Tea growth suitability in Mingshan cultivated land is at the appropriate middle and upper range of level. (2) First and second class land were highly appropriate and suitable cultivated land for tea growing in Mingshan, These cultivated land soil of fertilizer supply and preservation were better performance, was a important tea production base in Mingshan. Three or four class land are moderately suitable and barely suitable cultivated land for growing tea, which had the following problems. First, at some areas of soil pH was slightly alkaline or neutral, adverse impact on the soil nutrients absorption for tea tree. Second, the slope of the ground was large, soil erosion was serious, and the plow layer was shallow. Thirdly, lack of soil nutrient comparative, a high organic matter level but rapidly available nitrogen was at a middle level, alkali-hydrolyzable nitrogen and available phosphorus was in lower and middle level. Fourthly, some areas soil was sticky, heavy clay compaction, bad permeability, so that was not conducive to tea tree seedling emergence.(3) According to the different problems of each level in the soil in Mingshan, adopt the method of adjusting measures to local conditions to undertake administrative.Using different methods of fertilization for soil acidification and pH neutral and alkaline soil areas for improvement, higher slope areas by terracing ladder ridge terracing, buildup organic manure for the lack of soil nutrient and other measures, meanwhile paying attention to balance fertilization. Using the soil doped with sand or soil structure conditioner to adjust the texture partial stick soil structure.

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil fertility (soil fertility ) > Soil fertility and plant
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