宁夏石嘴山市简泉村天然富硒土地地球化学特征及开发利用前景OA

Soil is the core carrier of agricultural production,and the quality of the soil determines the quality of the crops.Taking the natural selenium-rich farmland in Jianquan Village,Shizuishan City,Ningxia as the research object,a systematic investigation and analysis of the geochemical characteristics of the soil was carried out.The research found that the overall soil in Jianquan Village is alkaline,the soil environmental quality is clean,and it is rich in various trace elements.The average selenium content of the soil is 3.75 times the background value of Ningxia soil and 2.7 times the standard of selenium-rich soil in Ningxia.All the plots in the area meet the criteria for natural selenium-rich land.The Yanghugou stratum of the carboniferous period in the piedmont area of the Helan mountain has undergone long-term weathering and erosion,and the detrital materials have been transported and deposited by water,continuously inputting selenium and other various trace elements into the farmland of Jianquan Village.This is sufficient to ensure the sustainable development of the selenium-rich industry in Jianquan Village.Utilizing the natural selenium-rich soil for the cultivation of watermelon and muskmelon is the optimal path for the efficient utilization of selenium-rich land;large-scale cultivation of selenium-rich wheat for processing selenium-rich flour can be carried out;at the same time,companion planting of selenium-rich corn,selenium-rich alfalfa and other forage can be carried out,and selenium-rich livestock breeding can be developed,and characteristic selenium-rich beef and mutton can be developed.