Water And Fertility Characteristics Of Different Vegetation Types In Rainy Area Of West China

Different types of vegetation that could significantly affect soil water and fertilizer characteristics, thus changing the terrestrial ecosystem nutrient cycling and other key processes, but it has been lack of appropriate research. Therefore, to understand the fertilizer characteristics of different vegetation types in the Rainy Area of West China. Take several typical forestry vegetation types in the Rainy Area of West China as the research object which is the soil of fruit gardens, Zea mays, Glycosmis cochinchinensis, Eucalyptus grandis, Prunus persica, Cinnamonum camphora and Citrus maxima in the study areas of Pujiang and Ya’an. The test is use of ring knife combines with the indoor experiment of physical and chemical analysis to study the content characteristics of Soil bulk density, Soil water content, Total carbon, Total nitrogen, Total phosphorus, Water-soluble carbon, Ammonium nitrogen, Nitrate nitrogen and Available phosphorus. The test is conducive to understanding the soil fertilizer characterized under different vegetation types in the Rainy Area of West China and provides a scientific basis of rational land use management in terrestrial ecosystems.(1) The experimental results show that the upper Soil bulk density of the fruit gardens, Zea mays, Glycosmis cochinchinensis, Eucalyptus grandis, Prunus persica, Cinnamonum camphora and Citrus maxima were 1.37,1.46,1.22,1.59,1.22,1.48 and 1.43, respectively; the lower Soil bulk density were 1.37,1.46,1.46,1.37,1.52, 1.54 and 1.61, respectively. Different vegetation types had significant effects on soil bulk density, and soil bulk density and soil porosity was negatively correlated. Comparison of different vegetation types in soil moisture found that soil moisture in the upper Eucalyptus grandis forest soil moisture index of the lowest, it was about 0.2, Prunus persica highest indicators were greater than 0.5; Citrus maxima in the lower soil moisture various indicators of soil moisture content is relatively low, the moisture index higher in Eucalyptus grandis, Eucalyptus grandis undisturbed soil moisture content of less than 0.2 in addition, other aquifer indicators are more than 0.4. The results also showed that the maximum capacity of the soil reservoir in different vegetation types as follows:Glycosmis cochinchinensis> Prunus persica> fruit gardens> Citrus maxima> Zea mays> Eucalyptus grandis> Cinnamonum camphora.(2) Compared with soil nitrogen under different vegetation types found that different used land types impact on soil nitrogen content are more obvious differences, total nitrogen content ranged between 7.53 and 13.49, the highest value of the upper is Prunus persica, the minimum value lower for the Eucalyptus grandis woodland. Total nitrogen content as follows:Prunus persica> Cinnamonum camphora.> Glycosmis cochinchinensis> Eucalyptus grandis> Citrus maxima> fruit gardens> Zea mays. Soil nitrogen and soil nitrogen pool is not consistent, the soil nitrogen pool of fruit gardens, Zea mays., Eucalyptus grandis, Prunus persica and Cinnamonum camphora in the subsoil is larger than the upper soil layers, while the upper soil nitrogen pool of the Glycosmis cochinchinensis and Citrus maxima to is larger than the lower, compared to other vegetation types, the soil nitrogen pooi of upper and lower in the Zea mays libraries are relatively small, and the upper soil nitrogen pool of Glycosmis cochinchinensis, Citrus maxima and Prunus persica is relatively large, the subsoil nitrogen pool of Eucalyptus grandis, Cinnamonum camphora. and Prunus persica is relatively large. The upper layer of soil ammonium nitrogen as follows:Zea mays.> Cinnamonum camphora.> Prunus persica> fruit gardens> Glycosmis cochinchinensis> Citrus maxima> Eucalyptus grandis, the nitrate content as follows: Glycosmis cochinchinensis> Zea mays> Cinnamonum camphora.> Prunus persica > fruit gardens> Eucalyptus grandis> Citrus maxima; ammonium nitrogen content of the soil underlying performance:fruit gardens> Cinnamonum camphora.> Citrus maxima> Prunus persica> Zea mays.> Eucalyptus grandis> Glycosmis cochinchinensis, nitrate content as follows:Cinnamonum camphora.> Zea mays.> Citrus maxima> fruit gardens> Glycosmis cochinchinensis> Prunus persica> Eucalyptus grandis. The soil nitrogen storage capacity in different types of vegetation ranged between 5.49 and 11.80 Mg·hm-2, the soil total nitrogen storage as fllow: Prunus persica> Cinnamonum camphora.> Glycosmis cochinchinensis> Citrus maxima> fruit gardens> Eucalyptus grandis.> Zea mays.(3) The soil total phosphorus content of artificial vegetation types typical In the Rainy Area of West China performance that the upper layer is greater than the lower, the soil total phosphorus content under different vegetation cover types as follows: Cinnamonum camphora.> Citrus maxima> Prunus persica> fruit gardens> Zea mays.> Glycosmis cochinchinensis> Eucalyptus grandis, the soil phosphorus pools and soil total phosphorus content is not entirely consistent, the lower of soil total phosphorus pools in the Zea mays, and Eucalyptus grandis is lower than layer, but the upper is larger of the soil total phosphorus pools in the other vegetation types. the average content of soil available phosphorus in different types of vegetation are between 17.53 mg·kg-1 and 73.89 mg·kg-1, That survey showed the Zea mays.> Cinnamonum camphora.> Glycosmis cochinchinensis> Citrus maxima> Prunus persica> Eucalyptus grandis> fruit gardens. In the storage capacity of the soil: phosphorus under different vegetation types are between 0.0039 and 0.0093 Mg-hm"2^ specifically between the Glycosmis cochinchinensis> Prunus persica> Zea mays.> Eucalyptus grandis> Cinnamonum camphora.> Citrus maxima> fruit gardens.(4) Soil organic carbon content in the measured plots is between 0.3 and 1.34 mg·kg-1, with the highest value is the organic layer of soil in the Glycosmis cochinchinensis, the minimum value is the mineral soil layer in the Eucalyptus grandis. The Water-soluble carbon content is between 12.89 and 138.49 mg·kg-1, the highest is the Glycosmis cochinchinensis in the mineral layer, the lowest value is soil organic layer in the Cinnamonum camphora. Soil organic carbon storage as follows: Citrus maxima (99.20 Mg·hm-2)> Glycosmis cochinchinensis (70.21 Mg·hm-2)> Zed mays. (66.31 Mg·hm-2)> Prunus persica (61.90 Mg·hm-2)> Cinnamonum camphora. (54.87 Mg·hm-2)> fruit gardens (48.98 Mg·hm-2)> Eucalyptus grandis (43.19 Mg·hm-2). Soil soluble carbon stocks were:fruit gardens (0.92 Mg·hm-2)> Glycosmis cochinchinensis (0.89 Mg·hm-2)> Citrus maxima (0.54 Mg·hm-2)> Zea mays. (0.51 Mg·hm-2)> Eucalyptus grandis (0.38 Mg·hm-2)> Prunus persica (0.33 Mg·hm-2)> Cinnamonum camphora. (0.24 Mg·hm-2).In summary, the Soil bulk density, Soil water content, Total carbon, Total nitrogen, Total phosphorus, Soil soluble carbon, Ammonium nitrogen, Nitrate nitrogen and Available phosphorus content in different types of forest vegetation is a degree of difference, fully illustrate the different types vegetation to keep soil water and fertilizer characteristics significantly different. Get through studying the different vegetation types maintain fertilizer characteristics, evaluation of different types of vegetation retention capacity of water and fertilizer in order to the rational use of land resources, the rational allocation and layout of agriculture and forestry production, revegetation and provides a theoretical basis for ongoing western ecological environment construction.