Effect of forest thinning on soil net nitrogen mineralization and nitrification in a Cryptomeria japonica plantation in Taiwan

We investigated the effect of forest thinning on soil nitrogen mineralization, nitrification and transformation in a Cryptomeria japoni-ca plantation at high elevation to provide basic data for forest manage-ment. We chose four study plots for control, light, medium and heavy thinning treatment, and three sub-plots for buried bag studies at similar elevations in each treatment plot to measure the net N mineralization and nitrification rates in situ. The contents of soil inorganic N （ammonium and nitrate） were similar between treatments, but all varied with season, reaching maxima in September 2003 and 2004. The seasonal maximum net Nmin rates after four treatments were 0.182, 0.246, 0.303 and 0.560 mg？kg-1？d-1 in 2003, and 0.242,0.258,0.411 and 0.671 mg？kg-1？d-1in 2004, respectively. These estimates are approximate with the lower annual rates of N mineralization for this region. Forest thinning can enhance net N mineralization and microbial biomass carbon. The percentage of annual rates of Nmin for different levels of forest thinning compared with the control plot were 13.4%, 59.8%and 154.2%in 2003, and 0.1%, 58.8%and 157.7%in 2004 for light, medium, and heavy thinning, respectively. These differences were related to soil moisture, temperature, precipita-tion, and soil and vegetation types. Well-planned multi-site comparisons, both located within Taiwan and the East-Asia region, could greatly im-prove our knowledge of regional patterns in nitrogen cycling.

Evaluation of Cadmium Bioavailability in Soils Using Diffusive Gradients in Thin Film Technique and Traditional Methods

The developed technique of diffusive gradients in thin film( DGT) has been suggested as a promising tool for evaluation of cadmium( Cd) availability in soils,but there exists considerable debate on its suitability. In this study,Cd bioavailability in soils was systemically investigated by comparing this technique with seven traditional methods, including soil solution concentration and six commonly used extraction methods( HAc,EDTA,Na c,NH4Ac,CaCl2 and MgCl2). Two typical plants( wheat and maize) were examined for Cd uptake. Maize was more sensitive to increasing exposure to Cd in soils than wheat when the added amounts of Cd ranged from 3. 5 to 5. 0 mg · kg-1,accompanied by the significant decreases of shoot and root biomasses. Cd concentrations in shoots and roots of two plants increased continuously with increasing levels of Cd in soils. Cd uptake was higher in wheat than that in maize. The bioavailable concentrations of Cd measured by all methods increased nearly linearly with increasing addition of Cd in soils. Positive correlations were observed between various bioavailable indicators of Cd in soils and Cd concentrations in two plants. The extractable Cd by six chemical extractants was considerably higher for maize than for wheat,while the DGT-measured and soil solution concentrations of Cd were lower for maize than for wheat,following the same trend as plant Cd uptake. The results imply that DGT measurement can effectively predict the bioavailable levels of Cd in soil solutions and that it is an ideal tool for prediction of Cd bioavailability in soils.

Metal Uptake by Plants from Soil Contaminated by Thin-Film Solar Panel Material

Various metals, including zinc (Zn), nickel (Ni), aluminum (Al), chromium (Cr), gallium (Ga), lead (Pb), copper (Cu) and indium (In), may be released and cause contamination when scrapped end-of-life (EoL) Cu(InGa)Se2 thin-film solar panel (CIGS TFSP) is buried in the soil. In this study, we grew Brassica parachinensis L. H. Bariley (VegBrassica) in three different types of soils, namely, a commercial soil, a Mollisol, and an Oxisol, which had been contaminated by CIGS TFSP to various extents. The concentrations of contaminants in these soils were positively correlated with both the amount of CIGS TFSP added and the burial period. Plants grew well in commercial soil and Mollisol, but those in Oxisol showed prominent signs of chlorosis and died after 30 days. The bioaccumulation factor (BF) and concentration of Zn in VegBrassica grown in commercial soil with 10% of CIGS TFSP added were 3.61 and 296 mg/kg, respectively, while the BF and concentration of In of VegBrassica grown in Mollisol were 3.80 and 13.72 mg/kg, respectively. The results showed that soils were contaminated by metals released from CIGS TFSP, and different adsorption patterns were observed for VegBrassica?depending on which types of metals associated with the soil properties.

薄层水流冲刷条件下斜坡土体的临界起动

斜坡土体侵蚀是丘陵地区和水库岸坡普遍存在的灾害现象,其主要动力因素是降雨或者波浪上爬产生的薄层水流对土体产生的冲刷剪切作用。为探索水流冲刷作用下的斜坡土体临界起动条件,采用自主研发的冲刷起动试验装置,开展斜坡土体的冲刷起动试验和理论研究。通过颗粒染色和高倍数电子显微等技术手段观测无黏性土颗粒的起动现象,确定了无黏性岸坡土体的起动模式与水流流速的相互关系;探索了不同干密度、不同黏粒含量及不同坡度与黏土斜坡临界起动流速的相互关系,土体的黏粒含量、干密度及坡度对黏性土体的起动流速影响较大,与干密度和土体坡度相比,黏粒含量对黏土斜坡的起动流速影响更为明显。验证了无黏性岸坡土体的临界起动方程,其中滚动起动流速方程具有较强的可靠性;基于黏土的起动模式构建了黏土斜坡的起动力学平衡方程,获得了黏土斜坡半经验半理论的起动流速方程,用试验结果求解了起动流速方程的相关参数,最终确定的起动流速公式与试验结果拟合度较好,同时验证了起动流速公式的可靠性。

高强度间伐对马尾松叶片与土壤养分关系的影响

为研究高强度间伐对马尾松(Pinus massoniana)叶片与土壤养分关系的影响,以间伐后5 a和未间伐(对照)马尾松人工林为研究对象,分析叶片和0~60 cm土壤理化性质和氮、磷化学计量特征,以及叶片与土壤氮磷的相关性。结果表明,高强度间伐显著降低马尾松人工林的土壤含水量,提高土壤pH,并且降低0~20 cm土层全氮、全磷、碱解氮和速效磷含量,对20~40 cm土层氮、磷含量影响不显著。高强度间伐对马尾松叶片氮含量影响不显著,显著降低叶片磷含量,导致叶片氮磷比升高50%。对照马尾松叶片氮含量与10~40 cm土层碱解氮含量显著相关,间伐后相关性不显著。间伐和对照马尾松叶片磷含量与土壤速效磷含量相关性均不显著。说明研究区马尾松生长主要受到氮限制,高强度间伐在短期内降低了土壤氮、磷含量,并缓解了马尾松生长的氮限制。

不同改造模式下马占相思林凋落物和土壤水文效应分析

为研究不同间伐强度和乡土阔叶树种套种对华南地区马占相思Acacia mangium人工林(林龄25年)地表凋落物和土壤水源涵养的影响,以东莞市大岭山森林公园内东莞市林业科学园的马占相思人工林为研究对象,设置3种间伐强度:0、30%、60%,编号为A、B、D,间伐后以相同措施均匀套种49种乡土阔叶树种,以不间伐、不套种的马占相思纯林为对照(编号C)。改造15年后,采用典型样地调查法,在各样地设立12个凋落物收集器,采集凋落物;采用环刀法采集表层土壤(0~20 cm)。用浸水法和烘干法研究凋落物、土壤的持水能力。不同改造模式下马占相思人工林凋落物生物量、最大持水量、最大拦蓄量、有效拦蓄量变化范围分别为0.72~1.18 t·hm^(-2)、17.70~28.64 t·hm^(-2)、136.46~234.37 t·hm^(-2)、113.32~195.37 t·hm^(-2),均呈现A>B>D>C,且不同改造模式差异显著(P<0.01)。通过回归拟合发现,累积持水量与浸水时间呈显著的三次关系,吸水速率与浸水时间呈显著的倒数关系;累积失水量与失水时间呈显著的三次关系,失水速率与失水时间呈显著的倒数关系。不同改造模式下的土壤毛管孔隙度变化范围为19.63%~26.85%;非毛管孔隙度变化范围为13.94%~19.6%;总空隙度的变化范围为38.27%~43.84%;土壤容重变化范围为1~1.09。研究还发现,土壤总孔隙度和毛管孔隙度越高,土壤保水能力越好。该研究结果表明:不同间伐强度和乡土阔叶树种套种对凋落物和土壤的水文效应的影响较为显著。从林分质量和森林经营可持续发展的角度考虑,间伐与套种相结合的模式在增加生物多样性、促进森林更新与演替、提高枯落物和土壤水源涵养功能等方面更具优势。

川西柳杉幼林间伐后林下植被和土壤特征变化

为缓解柳杉人工林密度大、林分质量差等问题,对其进行抚育间伐,分析比较林下植被及土壤特征对不同间伐强度的响应,旨在为柳杉人工林的科学经营提供一定的理论基础。以雅安市雨城国有林场羊子岭工区8年生柳杉人工林为研究对象,在初始密度为2800株·hm-2的人工林中设置4个强度(对照0%、轻度20%、中度30%、重度40%)开展间伐试验;间伐4 a后,监测并分析其林下植被、土壤特征变化。结果表明,草本层各处理间Shannon指数及Pielou指数差异不显著,轻度间伐多样性指数最低;间伐后灌木层Shannon指数、Pielou指数及物种丰富度显著高于对照,分别是对照处理的7、3、6倍,且灌木层物种丰富度增加量明显高于草本层。间伐可使土壤物理性质得到明显改善,土壤容重随间伐强度增大而显著降低,中度间伐强度相对于对照降低了24.45%,轻度和中度间伐的土壤毛管孔隙度与对照样地差异显著;重度间伐土壤pH及有效磷(P)含量相对于对照显著降低6.79%、25%,土壤有机质、全氮(N)、全磷(P)以及水解N含量随间伐强度的增大而增加,其中轻度间伐处理的土壤有机质含量增加量最高,比对照增加了94.66%。土壤过氧化氢酶和蔗糖酶活性随间伐强度增大而增强,重度间伐和中度间伐活性最高,且与其他处理差异显著。冗余分析结果显示,胸径年增量、草本层植物多样性等均与土壤全N和水解N存在显著相关性。研究表明川西地区柳杉幼林可采取间伐措施改善林分环境。

间伐保留密度对杉木人工林生长的影响

以广东省清远市11年生杉木人工林为研究对象,探究了不同保留密度(1200、1800、2500株·hm^(-2))杉木人工林3 a期间的动态生长规律、环境影响因子间差异、林分生长与环境因子之间的关系。结果表明:随着间伐保留密度的增加,杉木人工林的林分平均胸径、树高、冠幅、单株材积的3 a生长量及生长率均有所下降,小、中径材的出材量明显上升,其中,保留密度为1200株·hm^(-2)的林分大径材出材量最高,为22.46 m^(3)·hm^(-2);其次是保留密度为1800株·hm^(-2)的林分,大径材出材量为15.36 m^(3)·hm^(-2);保留密度为2500株·hm^(-2)的林分无大径材产出。保留密度为1800株·hm^(-2)林分的总出材量最大,为131.55 m^(3)·hm^(-2)。随着间伐保留密度的降低,林冠开阔度和光照均有所增加,其中,保留密度为1200株·hm^(-2)的林分光照条件优于其他2种保留密度林分。不同土层间各土壤理化性质变化趋势基本一致,较多的土壤理化性质在保留密度为1200株·hm^(-2)时表现最好。灌木层和草本层物种多样性各指数大多在保留密度为1200株·hm^(-2)时最大。林分的生长主要与林冠开阔度、叶面积指数、林下直射光、散射光、土壤pH、全氮质量分数、土壤密度、草本层Shannon-Wiener指数和Patrick指数显著相关(P<0.05)。将低保留密度(1200株·hm^(-2))作为林分经营密度的效果最佳,最适合大径材的培育;若仅考虑木材产出,则应选择1800株·hm^(-2)为经营密度,该保留密度下总出材量最大。

抚育间伐强度对针阔混交林碳动态变化的影响

【目的】为探讨抚育间伐对枯落物分解过程的影响,研究枯落物与土壤碳动态变化过程,深入解析不同抚育间伐强度下枯落物分解对温度循环次数的响应,探究抚育间伐强度对针阔混交林碳动态变化的影响。【方法】以小兴安岭地区天然针阔混交林为研究对象,设置1块未抚育间伐对照样地和6块抚育间伐强度分别为10%、15%、20%、25%、30%、35%样地,采用外业与内业相结合的方法,通过控制温度循环次数,分别选取夏季3个月的平均气温作为代表温度进行试验,2个温度交替培养12 h为1个循环,共循环90次,分别在温度循环的第0、3、7、15、30、60、90次取出培养盒。研究夏季不同抚育间伐强度下,2种分解程度包括未分解层和半分解层枯落物的质量残留率、质量损失速率和枯落物与土壤有机碳对温度的响应过程,研究不同间伐强度林地中的枯落物在温度循环中的分解程度及有机碳释放动态。【结果】半分解枯落物比未分解枯落物更易分解。夏季末期半分解枯落物质量损失显著,35%间伐强度时,未分解枯落物质量残留率最低;半分解枯落物分解程度随间伐强度增大先上升再下降,20%间伐强度时,枯落物质量残留率最低。0%~15%和35%间伐强度下,夏季结束后枯落物有机碳上升;25%、30%间伐强度时,枯落物和土壤有机碳均下降;间伐强度为20%时,未分解枯落物有机碳下降,半分解上升。15%间伐强度下,未分解枯落物土壤有机碳下降,半分解上升,其他间伐强度下土壤有机碳上升。20%间伐强度时,枯落物分解程度最高,未分解枯落物中有机碳释放到半分解枯落物和土壤中。25%、30%间伐强度下,枯落物分解使其中的碳元素释放到周边环境中,枯落物和土壤有机碳均下降。【结论】夏季结束后半分解枯落物比未分解枯落物分解程度更高。凋落物一般在分解初期分解较快(易分解物质较多)而在后期分解较慢(易分解物质的消耗和难分解物质的积累)。抚育间伐不仅有利于枯落物分解,也有助于枯落物和土壤固碳。研究表明,在夏季,35%间伐强度林地枯落物分解程度高,枯落物和土壤固碳能力强。

间伐对杉木林枯落物和土壤水源涵养能力的动态变化分析

探讨不同间伐年限对杉木林枯落物层和土壤层持水能力的影响,为评估杉木林水源涵养功能对间伐的响应提供科学依据。以浙西南景宁县间伐1年、间伐3年、间伐8年和未间伐的杉木林为对象,采集枯落物与土壤样品,分析测定枯落物含水率、持水能力、土壤容重、非毛孔隙度并计算相关指标。结果表明:杉木林枯落物现存量在不同间伐年限间的差异并不显著(P>0.05);枯落物持水量、持水速率与浸水时间的关系分别符合对数函数和幂函数;间伐8年的杉木林枯落物层的最大持水率、最大拦蓄率和有效拦蓄率均显著高于未间伐林分(P<0.05);间伐3年、间伐8年的杉木林枯落物最大持水量和有效拦蓄量均显著高于未间伐林分;间伐8年杉木林地0~10 cm土层土壤容重显著降低(P<0.05),非毛管孔隙度显著增大,非毛管持水量显著增加了22.4%(P<0.05),而对10~30 cm土层土壤储水性能相关指标的影响不显著(P>0.05)。综上,杉木林枯落物层和土壤层的水源涵养功能随着间伐年限的延长而增强。

全吸力范围非饱和持水函数和渗透性函数的预测模型

非饱和土的持水函数和渗透性函数是刻画其持水能力和水分运移的基本参数。由于物理机制不同,持水函数及渗透性函数在毛细阶段和吸附阶段的特征有显著差异。多数传统的持水和渗透性函数仅考虑了毛细阶段内,毛细水的持水和渗透特性,不能表征吸附阶段内吸附水的特征。为使传统函数模型在吸附阶段也适用,以传统VG持水函数和VG-M渗透性函数为基础,用修正参数C(ψ)修正VG持水函数,并以此确定非饱和土的残余值ψr,区分毛细水的毛细流动和吸附水的薄膜流动。基于薄膜流动的特点,提出参数Γ(ψ),改进了传统VG-M渗透性函数在吸附阶段内低估非饱和渗透系数这一问题,从而建立了全吸力范围的渗透性函数模型。最后用3组持水及渗透性试验结果验证修正模型的合理性,结果表明修正持水函数模型和渗透性函数模型的预测结果在吸附阶段较传统模型更符合实测结果。

森林抚育间伐的影响、工作原则及技术要点分析

抚育间伐是森林培育过程中的一项重要技术措施,对林分密度和空间布局、林木健康成长等有着十分重要的影响。然而实践中,由于对森林抚育间伐对象确定不合理、技术运用不恰当等原因,导致林木抚育间伐效果不理想。文章介绍了森林抚育间伐的重要影响,然后指出了抚育间伐作业过程中应当遵循的原则,最后重点从合理确定间伐抚育对象、选择适宜的间伐方式、控制间伐强度、加强后期管理等方面提出了提高抚育间伐效果的一些措施建议。

Iterative technique for circular thin plates on Gibson elastic foundation using modified Vlasov model

In this paper, to investigate the influence of soil inhomogeneity on the bending of circular thinplates on elastic foundations, the static problem of circular thin plates on Gibson elasticfoundation is solved using an iterative method based on the modified Vlasov model. On the basisof the principle of minimum potential energy, the governing differential equations and boundaryconditions for circular thin plates on modified Vlasov foundation considering the characteristics ofGibson soil are derived. The equations for the attenuation parameter in bending problem are alsoobtained, and the issue of unknown parameters being difficult to determine is solved using theiterative method. Numerical examples are analyzed and the results are in good agreement withthose form other literatures. It proves that the method is practical and accurate. Theinhomogeneity of modified Vlasov foundations has some influence on the deformation andinternal force behavior of circular thin plates. The effects of various parameters on the bending ofcircular plates and characteristic parameters of the foundation are discussed. The modified modelfurther enriches and develops the elastic foundations. Relevant conclusions that are meaningful toengineering practice are drawn.

Experimental studies on curling development of artificial soils

Soil curling is an important phenomenon associated with volume changes induced by increasing soil suction upon desiccation.The study of soil behaviors associated with drying in soils(e.g.soil shrinkage,desiccation cracks and curling)has received increasing attention over the last few years,which has been mainly driven by the forecast climate change that will warm up our planet.There are significant gaps in the current knowledge related to the factors that control the development of curling deformations in soils.For this,the curling phenomenon is investigated through laboratory desiccation tests on different mixtures of artificial soils.The effects of soil grain size distribution,mineralogy,soil microstructure,and soil water content on the curling deformation are analyzed.Digital photos were taken at regular time intervals during the tests to understand the volume changes in the soil samples during drying.It is found that soil fabric and soil water content have significant effects on curling scenario.It is observed that the percentage of sand particles and the initial water content play a critical role in the development of soil curling.Samples of pure clayey minerals experienced shrinkage without or with minor curling during drying.

垫层隔震基础动力阻抗薄层法求解及参数分析

基于半无限弹性地基模型,引入薄层法,推导出层状地基中垫层隔震基础的动力阻抗解答,与黏弹性边界有限元模型进行对比,验证了方法的合理性。针对垫层隔震基础的水平和摇摆动力阻抗,开展了系统的参数分析。模型的计算结果表明:在0~10Hz,垫层厚度、桩数对摇摆阻抗均有着明显的影响,垫层厚度越大,垫层隔震基础的摇摆阻抗越小;桩数越多,垫层隔震基础的摇摆阻抗越大。此外,相同条件下,桩长越大,垫层隔震基础摇摆阻抗实部越大;垫层剪切波速对基础的水平和摇摆阻抗都有着一定的影响。该方法可用于分析垫层隔震基础在地震荷载作用下的动力特性。

不同间伐处理对马尾松人工林土壤特性季节动态变化的影响

通过对马尾松人工林进行不同强度的间伐处理,探讨间伐处理4 a后土壤酶活性、土壤碳氮质量分数、微生物数量的季节变化模式。结果表明:相对未间伐处理(T_(0)),轻度间伐(T_(1))对碱解氮质量分数及硝化细菌数量、中度间伐(T_(2))对氨化细菌及硝化细菌数量的影响受季节变化调控,2种间伐处理在各季节中对其余土壤特性均表现出稳定促进作用,但促进效应无明显的季节规律。重度间伐(T_(3))仅对土壤全氮质量分数、放线菌及真菌数量具有稳定促进作用,该处理持续不显著抑制过氧化氢酶活性,对其余土壤指标的影响存在季节性差异,但无明显规律。主成分分析显示,间伐能提高林地质量,不同处理下土壤质量由优到差依次为:T_(2)处理、T_(1)处理、T_(3)处理、T_(0)处理。对马尾松人工林进行适度间伐作业可以提高林地土壤质量,而中度间伐是3种间伐强度中的最优选择。间伐对部分土壤特性的影响因季节而异,土壤因子的季节变化是准确判断间伐措施对土壤质量影响的重要考量。

Influence of thinning on acidic deposition in Chinese fir plantations

Acidic deposition,which is mainly caused by atmospheric pollution,is one of the global environmental problems.Thinning is an effective management to improve the tree productivity,reduce the wildfire risk and maintain a healthy forest.Since thinning may reduce the effect of acidic deposition,the effect of thinning on acidic deposition was estimated.The biomass,soil properties,pH value of runoff and groundwater in both unthinned and thinned Chinese fir plantations were measured and compared over a 5-year period(2-6 years after thinning).The results indicated that acidic deposition in the Huitong State Ecosystem Research Station was serious,and it got worse with time.Forest thinning resulted in a huge change in biomass and soil properties.During the 5-year monitoring period,biomasses of understory and litter,plant species richness,coverage of undergrowth plant layer were significantly higher in thinned site than in unthinned site.Moreover,higher soil fertility as well as lower amounts of runoff and groundwater were found in thinned site.It was suggested that thinning could improve the structure of forest,leading to restoring the effluent(runoff and groundwater) pH to the normal value.

厚土层薄基岩高强度开采覆岩破坏高度与特征

为研究厚土层薄基岩高强度开采覆岩破坏特征,以千树塔煤矿12305工作面为研究背景,综合运用UDEC数值模拟、现场实测和理论分析等方法研究了工作面开采后厚土层薄基岩类似地质条件下覆岩移动破坏规律。结果表明:随着工作面不断推进,覆岩破坏高度变化呈现出缓增、突增、稳定3个阶段,缓增和突增阶段主要发生在薄基岩中,而稳定阶段则发生在厚土层中,同时厚土层存在一定的液性指数,导致地表下沉滞后;通过冲洗液漏失量观测和注水试验得到该工作面导水裂缝带发育高度为84.5~86.5 m,裂采比为7.9~8.1,数值模拟及理论计算结果均与实测结果较为接近;阐述了厚土层薄基岩“两带”破坏模式,该模式中薄基岩和厚土层分别起到支撑和施荷的作用,薄基岩易被采动裂缝贯穿,而厚土层对采动裂缝的上向发育具有抑制作用。研究结果可为类似条件下矿井的安全生产提供参考。

筏板基础下薄层土地基承载力研究

筏板基础下薄层土地基的承载力与均匀地基的承载力不同,不能简单地按通常的天然地基承载力方法来确定。通过现场压板载荷试验确定薄层土地基的强度指标和变形参数,把筏板基础分为若干网格。采用切线模量分层总和法计算各网格的地基刚度,把筏板基础看作为各网格支承下的弹性地基板,计算各网格共同作用下板底的压应力;将各网格的压应力与用薄层土地基强度参数计算的极限承载力比较,以判断地基强度承载力的安全性;再依据筏板的沉降变形,由薄层土地基的强度承载力和筏板基础变形控制确定这种含薄层土地基的允许承载力;通过与有限元方法进行比较,证明其是一种较合适的确定筏板基础下薄层土地基承载力的方法。

2种典型耕作方式影响下的蔗田土壤孔隙结构及其水分运动特性

为了明确农业生产过程中耕作方式对田间土壤孔隙结构及土壤水分运动特性的影响,以广西农地蔗田为研究对象,基于土壤切片技术分析研究免耕和垄耕2种典型耕作方式蔗田的田间土壤孔隙结构特征,并结合土柱模拟入渗试验,探究土壤孔隙结构对土壤水分运动的影响,进一步揭示孔隙结构与土壤水分运动特性之间的相互作用关系。结果表明:随着土层深度的增加,免耕蔗田孔隙形态以聚集的团块状分布为主,垄耕蔗田孔隙形态以条状分布为主。与免耕蔗田相比,垄耕蔗田的土壤总孔隙度和>2.5 mm孔径的孔隙度分别增加32.5%和21.9%。垄耕蔗田在局部土层深度范围内显著增加上下土层孔隙的变异度(p<0.05),显著降低土壤孔隙的连通性(平均邻近指数为0.448)(p<0.05),土壤孔隙形态相对规则(平均成圆率为0.335)。对于土壤水分运动特性,免耕蔗田总体的土壤饱和导水率和质量流率显著高于垄耕蔗田(p<0.05),初始含水率显著低于垄耕蔗田(p<0.05),质量流率随时间变化强度相对较大,提高水流入渗能力。垄耕降低土壤孔隙结构连通性,使水分蓄存在表层土壤中,一定程度上可降低土壤水分的入渗现象,改变蔗田土壤水分状况。