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Geoscience ›› 2022, Vol. 36 ›› Issue (03): 963-971.DOI: 10.19657/j.geoscience.1000-8527.2022.03.16

• Geochemistry • Previous Articles     Next Articles

Spatial Variability Characteristics and Influencing Factors of Available Contents of Nutritive Elements in Tillage Layer Soil of Ruian, Zhejiang Province

WANG Xueyin1,2(), HUANG Yiling1, QUAN Binbin1, LIN Daoxiu1, HAN Zhenchun1   

  1. 1. 11th Geology Team of Zhejiang Province,Wenzhou, Zhejiang 325006,China
    2. Wenzhou Key Laboratory of Geological Resources and Ecological Environment,Wenzhou, Zhejiang 325006,China
  • Received:2021-03-16 Revised:2021-09-22 Online:2022-06-10 Published:2022-07-19

Abstract:

Based on geostatistics,GIS and traditional statistical analysis,spatial variability characteristics and influencing factors of available contents of 9 nutritive elements in the tillage layer soil of Ruian were studied. The results showed that alkali hydrolyzable nitrogen in the tillage layer of the study area with the distribution trend of high in the west and low in the east,while that of available contents of potassium,boron,manganese,molybdenum,copper and zinc were low in the west and high in the east,available phosphorus is high in both east and west but low in the middle,and available iron distributed uniformly; there is a lack of available boron in the tillage layer soil in the central and western parts of the study area,a lack of alkali-hydrolyzable nitrogen in the east,and a lack of available phosphorus in the central,except for these,the available contents of 9 nutritive elements in other parts of the study area are all above the medium standard; semi-variance function analysis showed that available contents of manganese and iron had strong spatial correlation,alkali-hydrolyzable nitrogen,available contents of potassium,phosphorus,molybdenum,copper and zinc had medium spatial correlation,and available contents of boron had weak spatial correlation. It is considered that the neutral or weakly alkaline soil environment with high salt content and active cations is beneficial to the enrichment of available contents of potassium and boron,and the acidic or weakly acidic soil with high organic matter content is beneficial to the enrichment of alkali hydrolyzable nitrogen and available contents of iron; the controlling factors of available contents of potassium,molybdenum,boron,copper and zinc are similar,which are mainly affected by structural factors such as soil parent material,soil type and topography,as well as random factors such as fertilization and tillage. Alkali-hydrolyzable nitrogen,available contents of iron,phosphorus and manganese are mainly affected by structural factors such as soil parent material,soil type and topography.

Key words: available contents of nutritive elements, spatial variation, semi-variance function, influencing factors, tillage layer, Ruian

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