Regulating Control Technology Of Nutrient And Evaluation Of Soil Environment Quality By Camellia 0leifera Base In Shitun Town,Wangmo County,Guizhou Province

The overall evaluation is made to study the soil environment of quality condition of the Camellia Oleifera Base in Shi Tun town,Wang Mo county.According to the Soil nutrient fuzzy comprehensive evaluation method in the Second National Survey of Soil Classification Standards,the Organic Matters,Total Nitrogen（TN）,Total Phosphorus（TP）,Alkali-hydrolyzable Nitrogen,Rapid Available Phosphorus and Kalium of the soil were selected as the available nutrient indexes in the research.Besides,under the combination of Single Factor Pollutant Index（PI）and the Nemerow multi-factor Pollution Index,7 heavy metals（Cd、Cr、Pb、As、Cu、Zn、Hg）were selected as the test index of soil pollution.Nutrition Index and Contamination Index which belongs to the SQI Comprehensive Index were also used to overall evaluate the quality of Camellia park?s soil environment.This experiment adopts “3414” orthogonal regression design to study the influence to the growth and production volume of Camellia Oleifera under different fertilizer levels and the effect to Camellia Oleifera?s young shoot,chlorophyll and production volume under different fertilizer combination.We summarized the most suitable fertilizer combination and the research results are as below:（1）Camellia Oleifera is rich in Organic Matters,Total Nitrogen（TN）and Total Phosphorus（TP）,and Alkali-hydrolyzable Nitrogen,Rapid Available Phosphorus are in the medium position which can rate the Camellia Oleifera base?s soil nutrition comprehensive index 0.73 with medium fertilization.Camellia Oleifera base?s content of slowly available potassium is low and the single index evaluation stayed normal with comprehensive contamination index of 0.676 ranking in the level of “clean”.All the samples in the content of heavy metals get the “clean” level.There is potential risk in terms of comprehensive test soil heavy metal volume,but the test result is low-risk.The Integrated Quality Index of soil is 0.776,which is in the high level.The Shi Tun town should fertilize scientifically to improve the yield of the Camellia Oleifera,and appropriate prevention and control are needed to ensure the quality of the Camellia Oleifera.（2）The optimal output is calculated from one-factor model of which the maximum output is calculated from N-one-factor model.The optimum yields calculated from the functions are demonstrated as: one-factor model>three-factor models> two-factor model.Speaking of three-factor models,its production and invest ratio was the highest which can be recommended to be used for fertilization.The three-factor models was designed as Y=1.9+11.9X₁+3.7X₂-2.6X₃-36.5X₁²-1.6X₂²+0.6X₃²-6.0X₁X₂+6.3X₁X₃-0.4X₂X₃ and the optimal economy fertilization design combining the price of fertilizer and Camellia Oleifera can be illustrated as: N of 0.24kg/plant,P2O5 of 0.059kg/plant,K2 O of 0.101kg/plant.Including the organic fertilizer the total cost of fertilizer was 4.92yuan/plant.Finally,the optimum yield was 56.7 kg/plant with production and invest ratio of 7.45.（3）In January,on applying-basal area camellia bud is lengthened and chlorophyll content was increased by 31% and 16% respectively;In June,fertilizer make the camellia fruit size is no fertilizer treatment increased by 38%,the number increased by 23%,the yield increased by 36%.Results show that applying basal on plant growth in January there was a significant increase,June fertilizer can play the role of promoting the fruit growth and development,achieve the purpose of increase production of the combination.（4）The content of soil heavy metals in the soil was slightly elevated after fertilization,but there is no systematic heavy metal pollution risk with overall cleaning level.Fertilization can improve the content of soil?s organic matter and nitrogen phosphorus and potassium.Organic matter was improved from upper-second class to upper-first class,alkali-hydrolyzale nitrogen was improved from middle-third class to upper-first class,and rapidly available potassium was improved from middle-forth class to middle-third class.The rating of nitrogen,phosphorus delayed potassium did not change significantly.The soil fertility and content of heavy metal 10 meters from fertilization banding were not affected by fertilization.（5）Below effective nutrient adjustment technologies were tested by experiment : 1)The best ways of fertilization are organic fertilizer and inorganic fertilizer.2)The best ratio of nutrient is the fifth group（N 0.25 kg / plant P 0.5kg/plant k 0.125 kg/plant）.3)The most suitable for basal dressing is January（2 kg/plant organic fertilizer,60% of the total N,40% of P 40% of K）,and June is the best time for further fertilizer（40% of total N,60% of P,60% of K）.Basal is for annular groove method,and basal is applied garden annular groove.Effective nutrient control technology makes the oil-tea production increase significantly.Tested area achieved a total of 634 kg,and harvest brings no less than 3500 yuan of income to increase production.