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    Soil waterstable aggregate contents and chemical properties of bamboo(Phyllostachys heterocycla) and broadleaved mixed forest stands were studied in Jiangxi province. Researched stands can be divided into Type A(bamboo stands),Type B(5%~15% broadleaf trees),Type C(15%~25% broadleaf trees),Type D(25%~35% broadleaf trees) and Type E(35%~45% broadleaf trees).
    选取代表性竹阔混交林,根据阔叶树所占比例分成5种类型,即类型A(毛竹纯林)、类型B(阔叶树比例5%-15%)、类型C(阔叶树比例占15%-25%)、类型D(阔叶树比例占25%-35%)、类型E(阔叶树比例占35%-45%),分别测定林分土壤水稳性团聚体及化学性质。
    The results revealed that Type A had the lowest soil waterstable aggregate content,but highest soil structure destroy rate(average 37.27%),Type C had the lowest soil structure destroy rate(average 12.33%).
    结果表明:A类型林地土壤大于0.25 mm水稳性团聚体数量最少,土壤结构破坏率最高,平均达37.27%,类型C的土壤破坏率最低,平均为12.33%;
    (2) It was found that >0.25mm,>0.5mm water stable aggregates and water stable index can be regarded as the optimum 3 indexes to express soil anti-erodibility of the main forest types in Anji County by means of principal component analysis.
    (2)衡量安吉地区土壤抗蚀性的最佳3个指标是:>0.25mm水稳性团聚体、>0.5mm水稳性团聚体和水稳性指数。
    And the stand has better soil structure character and has stronger nutriment supply ability, total content of >0.25mm Water-stable soil aggreagate of 0-20 cm top soil is 9.99 % highter than that of Chinese fir plantation and organic materials of 0-20 cm top soil is 0.695 % higher than that of Chinese fir plantation.
    与杉木人工林相比,栓皮栎人工林具有良好的土壤结构和较强的养分供应能力。 其表层土壤>0.25mm水稳性团聚体含量比杉木人工林高9.99%,土壤有机质含量比杉木人工林高0.695%。
    Indexes including organic matter content, water stable aggregate content, mean weight diameter of water stable aggregate, aggregate degree and disperse coefficient were selected to evaluate soil anti erodibility of soil and water conservation forests component of different tree species at different ages.
    运用土壤有机质含量、水稳性团聚体含量、水稳性团粒平均重量直径、团聚度和分散系数等各项指标 ,对不同树种组成、不同林龄水土保持林的土壤抗蚀性能进行分析、评价 .
    Compared with that of Chinese pine pure forests, Chinese pine broadleaved mixed forests had higher soil organic matter content, and water stable aggregate content increased by 1.71%~38.53%, and soil anti erodibility was also increased with increasing stand age.
    与油松纯林相比 ,油松阔叶树混交林土壤有机质含量较高 ,水稳性团聚体含量增加了 1.71%~ 3 8.5 3 % ; 且随着林龄的增长 ,水土保持林土壤抗蚀性能不断增强 .
    the aggregate of >0.25mm in diameter hadincreased by 7.86%, the spoil ratio of aggregate structure was 30.03%, which was l5.69% less than that in pure stand soil;
    0~20cm土层中大于0.25mm的水稳性团聚体含量比纯林增加了7.86%; 结构体破坏率为30.03%,比纯林的降低了15.69%;
    In 0~10 cm depth of soil, the increments of >5 mm soil water stable aggregates in sharptooth oak forest, Chinese pine forest and meadow were 27.8%,14.0% and 5.7% respectively, and those of 2~5 mm were 6 0%, 11.1% and 8.6% respectively.
    1~ 2 mm粒级的土壤水稳性团聚体含量的增量锐齿栎林为 6.0 % ,油松林为 1 1 .1 % ,草丛 8.6%。
    Forest vegetation can obviously increase the number of >5 mm and 2~5 mm soil water stable aggregates.
    森林植被增加直径 >5 mm和 2~ 5 mm粒级土壤水稳性团聚体的作用明显
    Applying stepwise regression (the fiducial degree is 0.05), the equation of soil moisture content (y) can be expressed: y= 486. 709+ 2. 061X4 + 1.786X9 - 4.451X10 (R =0.830,X4 :content of waterstable granule, X9:rain fall before 15d, X10: evaporation from water surface).
    运用逐步回归(a=0.05)方法,建立土壤含水量(y)及其影响因子(X_4为水稳性团粒含量,X_9为测土壤水前15d的降水量,X_(10)为水面蒸发量)线性方程为y=486.709+2.061X_4+1.786X_9-4.451X_(10),R=0.830。
    In the 0~20 cm soil depths, in all the proportions, the waterstable aggregation(d>0.25) was improved by 6.21% compared to that under the pure fir forest.
    各模式 0~ 2 0cm土壤 >0 .2 5mm的水稳性团聚体含量比杉木纯林提高 6.2 1 % ;
    Fine-roots obviously increased the contents of >0.25 mm and >5 mm soil waterstable aggregates,and improved soil structure-stability.
    植物细根显著提高了>5 mm土壤水稳性团聚体及>0.25 mm水稳性团聚体含量,从而增加了土壤结构的稳定性;
    There is abundant radily nutrient in the locust×sea-buckthorn mixed forest,and there are a mass of clay and water-stable aggregate which is ≥0.25mm in it.
    其中刺槐×沙棘混交林地速效养分丰富,粘粒和≥0.25mm水稳性团聚体的数量大;
    In 0~20 cm soils layer,contents of the organic matter and water stable aggregates of the four kinds of shrubbery were much higher than that of the barren slope.
    4种灌木林地0~20 cm层土壤的有机质含量、水稳性指数和水稳性团聚体含量均大于荒坡地,土壤侵蚀量明显低于荒坡地。
    compared with the content of water stable aggregates in undisturbed forestland,the contents of water stable aggregates of >0.25 mm decreased separately by 16.59%,43.12% and 61.13%,the contents of water stable aggregates of >1.0 mm are separately 27.78% and 24.34% that of in undisturbed forest land;
    粘粒下降了8.10%、20.84%和30.72%,土壤表现出粗骨化趋势; >0.25mm水稳性团聚体含量比无干扰林地分别下降了16.59%、43.12%和61.13%,>1.0mm的团聚体含量仅为无干扰林地土壤的27.78%和24.34%,1.0~0.25mmm的团聚体下降幅度较小;
    wilfordii,and>0.25 mm composition of aggregates of subsurface soil,water holding capacity,and water conservation capacity increased by(3.2%,)(37.4%,)736.513 t·hm~(-2)respectively,while structure destructive rate of the soil decreased by 3.7%.
    与毛竹纯林相比,混农经营地土壤结构和水分性状得到一定程度的改良,表土层>0.25 mm的水稳性团聚体含量增加3.17%,结构体破坏率降低4.51%,土壤持水量增加37.4%,水源涵养量增加736.513 t. hm-2。
    Study on Soil Water Stable Aggregate of Grassland and Forest Flood During Grazing in Hilly and Gully Regions on the Loess Plateau
    黄土高原丘陵沟壑区放牧林草地团聚体水稳性的研究
    Biomass of Fine Root and Its Relationship with Water-Stable Aggregate in Compound Lands of Triploid Populus tomentosa on Lands Converted from Agricultural Lands
    退耕地三倍体毛白杨林地细根生物量及其与土壤水稳性团聚体的关系
    Function on soil and water conservation of the main forest types in Huangpu River, hydrological model base on wavelet analysis It showed:(1) It was found that >0.25mm,>0.5mm water stable aggregates and water stable index can be regarded as the optimum 3 indexes to express soil anti-erodibility of the main forest types in Anji County by means of principal component analysis.
    本文对黄浦江水源林的土壤渗透性、可蚀性、土壤水库容等水文生态功能、基于小波分析的水文模型构建进行了研究,结果表明: (1) 衡量安吉地区土壤抗蚀性的最佳3个指标是:>0.25mm水稳性团聚体、>0.5mm水稳性团聚体和水稳性指数。
 

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