基于土壤地球化学解析揭阳市荔枝种植适宜性

享有"中国荔枝之乡"之称的广东省揭阳市惠来县近年来积极发挥了示范带动作用.本研究是对揭阳市的荔枝种植进行适宜性评价,采集了主要种植区的土壤样品及相关的荔枝样品.通过地球化学的实验方法,首先讨论了揭阳市土壤重金属元素对荔枝的影响以及在地质图上的分布状况,整体重金属超标区域较小,因地质背景、工农业、地质矿产等因素导致自北向南共有3块小面积超标区;其次分析土壤主要元素与荔枝品质的相关性和吸收系数,确定荔枝的特征元素为Ca,Fe,Se,P,Mo,并讨论它们的分布,结合地质背景图可知第四系的土壤更适合荔枝的种植;最后分析整个土壤的地质背景.根据上述3种因素,对荔枝种植进行综合适宜性评价,并采用权重计算法,得到最适合荔枝种植的区域位于揭阳市的东部.

Analysis of Planting Suitability of Litchi in Jieyang, Guangdong Province, Based on Soil Geochemical Characteristics

Huilai County, Jieyang City, Guangdong Province, known as the "hometown of litchi in China", has played an active role in driving the demonstration in recent years. This paper is to evaluate the suitability of litchi cultivation in Jieyang City, and soil samples and related litchi samples were collected from the main planting areas. In the experimental methods of geochemistry, this paper firstly discusses the effects of soil heavy metal on the litchi in Jieyang City and the distribution of these heavy metals on the geological map, the whole region where the heavy metals in excess of the standard is small, there are three small areas from north to south exceeding the standard, due to the factors of the geological background, industry and agriculture, geology and minerals, etc. Secondly, analyzing the correlation between the main elements of the soil and the quality of litchi and the absorption coefficient, the characteristic elements of litchi were determined as Ca, Fe, Se, P, Mo and their distribution was discussed. According to the geological background map, the soil of quaternary system is more suitable for the cultivation of litchi. Finally, analyzing the whole soil geological setting. According to the above three factors, constructing the comprehensive adaptability model of litchi cultivation, and the weight calculation method was used to obtain that the most suitable area for litchi cultivation is in the eastern part of Jieyang City.