Research on slope vegetation method for Shirasu soil erosion

Shirasu土壤侵蚀坡面植被方法研究

• 批准号: 05660280
• 负责人: HOSOYAMADA Kenzo
• 金额: $ 1.41万
• 依托单位: Miyazaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05660280/
• 关键词: soil erosion; volcanic ash soil; rainfall; biomass; non-woven fabric; bacteria

(1)SOIL EROSION AND VEGETATION AT SLOPE COVERED BY NON-WOVEN FABRIC IN SHIRASU EROSION TEST PLOT,MIYAZAKI UNIV.CAMPUSIn 1995, annual precipitation was 2170 mm that is less compared with that of average year, and temperature in summer was high as renewing high record. So, vegetation was over growing. Soil loss from bare slope was 93.43 t/ha/year and nothing from non-woven fabric slope. Features of test results in this year were that vegetation of bush clover was remarkable and an invasion of Peneross family plant to the non woven fabric (no seeds) plot was also remarkable.(2)VEGETATIVE STATES AT TEST SLOPES IN ACTUAL UPLAND FIELDSVegetatin of slope for erosion test plots at HAE No.1, No.2 in Tano cho was so vigorous as over growing at this October in the stage of 4 year expiration, especially thick growing of bush clover has been remarkable about 2 years after. Vegetation was inferior to some degree at straw turf slope and vegetation net slope (1 m width) in HAE No.2 plot, but stability … More for slope erosion was not much influenced. At test slope where non-woven fabric was put on the simple vegetation net in HAE No.4 plot, effect of non-woven fabric for vegetation was much. At TOKIYA No.2, No.3 plots situated in Shirasu district of kiyotake cho, vegetation was generally stable about 3 years after. In the lower part of slope of former plot, there are some imperfect vegetation slope, so continuous observation willbe necessary.(3)MEASUREMENT OF BIOMASS C,N AND NUMBER OF BACTERIA AND FUNGIIt cleared that Biomass C,N total C and N obtained from soil samples of root zone covered by Non-woven fabric at MIYAZAKI UNIV.test plot increase in quantity, especially biomass C and total C were more in case of seeds containing.In case of test fields HAE and TOKIYA, the measurements have been started from the biginning of 1994 and biomass in non-woven fabric slopes have progressed every year, especially biomass C progressed remarkablly. Biomass C to total C and biomass N to total N had high plus correlation respectively and also influence of microorganism by meteorological condition must be considered. Less

（1）宫崎大学白须侵蚀试验区非织造布覆盖坡面的土壤侵蚀与植被1995年，年降水量为2170 mm，较常年偏少，夏季气温高，创历史最高纪录。因此，植被过度生长。裸坡的土壤流失量为93.43 t/ha/a，而无纺布坡的土壤流失量为0。本年度试验结果的特点是灌木三叶草的生长显著，Peneross科植物对无纺布（无籽）小区的入侵也显著。（2）实际高地试验坡的植被状况在4年期满期内，多野町HAE 1号、2号侵蚀试验坡的植被在今年10月生长旺盛，特别是灌木三叶草在2年后生长旺盛。HAE 2号样地的草坡和植被网坡（1 m宽）的植被状况较差，但稳定性较差 ...更多信息 对坡面侵蚀影响不大。在HAE 4号小区简单植被网上铺设无纺布的试验坡上，无纺布对植被的影响较大。在位于清竹町白须区的TOKIYA No.2、No.3样地，植被在3年后基本稳定。在前样地的坡下部，存在一些不完善的植被坡，需要进行连续观测。（3）生物量C、N及真菌、芽孢杆菌数量的测定结果表明：在宫崎大学无纺布覆盖试验区根区土样中，生物量C、N、全C、N的数量均有所增加，尤其是含种子的试验区，生物量C、全C的数量均有所增加，在HAE和TOKIYA试验区，从1994年开始测定，非织造布边坡生物量逐年增加，特别是生物量C的增加幅度较大。生物量C与全C、生物量N与全N的正相关性均较高，同时还应考虑气象条件对微生物的影响。少