Litchi (Litchi chinensis Sonn) is China's most competitive in the international community of one of the tropical and subtropical Guangdong Province is China's most important lychee-producing areas， cultivation and production areas rank first in the Although Guangdong litchi lychee industry in China has obvious competitive advantages， however， litchi production is not stable， there is a phenomenon in size， quality and output have yet to be This study is the analysis of mineral nutrition of litchi leaves and leaf chlorophyll and its relative content (SPAD value)， the relationship between for the further development of litchi leaves SPAD value parameters of a reasonable guide Lai Chi Yuen lay a good foundation for Chlorophyll of SPAD-502 (Soil and Plant Analyzer Devel-opment-502) is a hand-held spectrometer， by comparing the transmission through the leaves of the optical density Cha Du-drawn SPAD value， can be used for non-destructive experience in the field of plant leaf chlorophyll content Nutritional analysis of the leaves used diagnostic methods， combining the use of chlorophyll， guiding fertilization of fruit trees， fruit trees fertilization reasonable standard so that the fruit quality and continuously improve quality， reduce production costs This study by the Nuo Mici varieties of litchi in the late fall of this aging period sampling of its mineral nutrients and SPAD value of mineral nutrition of litchi leaves and leaf chlorophyll and its relative content (SPAD value) the relationship Through the fall slightly aging period of litchi leaves SPAD value and mineral nutrients in a stepwise regression analysis， was slightly aging autumn leaves SPAD value of litchi and leaves mineral nutrient content between the regression equation: SPAD = 539 +4846 NR = 7909488 (p = 01); can be seen from the equation SPAD value addition to mineral and nutrient content of the relationship between: fall slightly aging period of litchi leaves SPAD value of the increased volume of leaf nitrogen increased， SPAD value of Nitrogen exists between the significant positive correlation with the potassium content there are also significant positive correlation， the initial description SPAD value can be used as litchi adequate supply of nitrogen The results showed that: SPAD value of litchi leaves and leaf nitrogen content was a significant positive correlation between the initial description SPAD value can be used as litchi adequate supply of nitrogen parameters， the system can SPAD value of indicators as to guide the adequacy of nitrogen litchi P这是翻译高手翻译的o(∩_∩)
China's fruit production is not only a big country， but also the resources of fruit China's total fruit production， cultivation area， the types of resources， they know one another first in the As one of the world's native fruit center， China's fine selection of species and varieties have been introduced to the world， greatly promoted the development of the world's fruit production and improved varieties， the fruit industry of the world made a great contribution to China should play a fruit rich in resources and enhance fruit production and to speed up the progress of biotechnology to improve the use of fruit resources， establishment of a new type of modern fruit industry in order to promote China's sustainable development and efficient China has come a long way to efficient fruit development， must be scientific and effective Fruit mineral content which affects the quality of its output an important Nitrogen can promote the growth of shoots of fruit trees to improve the photosynthetic efficiency， reduce flower drop， fruit accelerated expansion and the promotion of flower bud If nitrogen is low， the tree malnutrition， short leaf yellow sticks， flower drop， weakened resistance to shorten life Phosphorus in the promotion of flower bud differentiation， flowering earlier results， the promotion of fruits， seeds mature， and to improve fruit quality to promote root growth and improve fruit cold， drought，抗盐碱ability are K is sufficient to promote mature branches， and enhance resistance， in particular， can increase the fruit， rendering a good， quality good， cracking less resistant storage， so it was the potassium known as the "fruit of " Calcium is conducive to plant heat and Calcium on soil microbial activity and insecticidal sterilization have good Calcium deficiency root growth is often so poor withered branches， flowers atrophy， easy to get stone fruit trees and root gummosis Fruit rot and is closely related to calcium deficiency， calcium and more fruit， markedly improved As well as other elements on the growth of production has a crucial Graduated from our design based on these facts， the basis of mineral content in order to use java + Access to develop diagnostic systems -------" fruit mineral nutrition diagnostic " The system is divided into several functional modules， including: registry， import， export， print， save， display historical data， is derived based on historical data and data modification， while the functions of the system， and a detailed analysis of the database design and describes this system development environment， tools and related
