| Geostatistics is a new discipline, it has an unique academic strengths and broad application prospects. With the development of geostatistical study, it also significantly contributed to Geostatistics in the spatial variability of soil nutrients from the beginning and gradually in-depth qualitative analysis to quantitative analysis. Thus, to improve soil spatial variability of the accuracy is very important.The research object to the soil nutrient in Mu Us Sandland, the paper used the Ordinary kriging and Cokriging method in the study to do research on the study area in 0 ~ 40cm soil total nitrogen, phosphorus, potassium, organic matter distribution features to reveal the spatial variability of soil nutrients law to provide for the accurate guidance of the scientific basis of agricultural production. The main researches and conclusions as follows:1,By the use of Kriging in Mu Us Sandland of four spatial variability structure of soil nutrient analysis results showed that the low soil nutrient content, according to China in 1979, the second set of soil nutrients in the soil survey classification standard The soil total nitrogen, phosphorus, potassium, organic matter content are very few nutrients, is six class, relatively poor soil.2,The Total Nitrogen and Available P in the soil was no significant correlation; and total Nitrogen and Organic matter with Potassium and showed a positive correlation in the study area. It showed that the higher the total nitrogen in the soil, Potassium and Organic matter content is also higher. The results also showed that total Nitrogen and Potassium, organic matter has a certain synergy.3,The application of the Cokriging method, total nitrogen on potassium and organic matter through a collaborative kriging, and analyzed and compared the results of the two methods,it showed that, the estimate of the Cokriging gram is closer to the experimental value than the Ordinary Kriging, and the Cokriging is more accuraty than the Ordinary Kriging method. |
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