不同生境下伊犁绢蒿构件生物量特征的研究

以新疆天山北坡荒漠草地典型植物伊犁绢蒿为研究对象,利用多因素相关性分析,从构件水平对不同生境条件下伊犁绢蒿地上与地下生物量构件结构、地上与地下生物量生长规律进行研究,揭示气象因素、土壤因素与地上生物量和地下生物量的关系.结果表明:随着生境中水分和热量条件的改善,伊犁绢蒿构件生物量特征在察布查尔县和奇台县之间存在极显著差异(P＜0.01);地上生物量主要受年均积温、年均降水量、土壤速效养分的正向影响,土壤总盐与地上生物量呈负相关,而地下生物量受年均积温影响较大;不同生境下构件组分对地上和地下生物量的分配率相似,地上都是茎＞花＞叶,地下都是主根＞侧根＞须根;地上和地下生物量随着茎干重和主根干重的增加而增加,其生物量与茎干重和主根干重有相同的物质生产和积累规律.     

缺氮和复氮对菘蓝幼苗生长及氮代谢的影响

对基质育苗后水培的菘蓝进行缺氮与复氮处理,分析其生长情况及氮代谢产物含量的变化,探讨缺氮和复氮对菘蓝幼苗生长及氮代谢的影响,以提高菘蓝产量和品质以及栽培过程中的氮素利用效率。结果显示:(1)正常供氮条件下,菘蓝幼苗的叶绿素含量、谷氨酰胺合成酶(GS)活性、硝态氮含量、靛玉红含量为最高,而其株高、主根直径、根的鲜重与干重、叶的鲜重与干重、根系活力均最小。(2)缺氮处理增加了菘蓝幼苗的主根直径和根干重,提高其根系活力和硝酸还原酶(NR)活性,促进游离氨基酸在叶中的积累;但降低了GS的活性,也降低了叶中硝态氮、可溶性蛋白、靛玉红及根中游离氨基酸的含量;缺氮对叶中靛蓝的含量无明显影响。(3)复氮处理增加了菘蓝幼苗的株高、主根长、根鲜重、叶鲜重、叶干重,提高了其根系活力,降低了NR和GS的活性;与对照相比,复氮降低了叶中硝态氮含量,提高了叶中可溶性蛋白、靛蓝及根中游离氨基酸的含量,但对叶中游离氨基酸和靛玉红含量影响较小。研究表明,缺氮后再复氮有利于菘蓝幼苗叶的生长,同时有利于增加其叶内靛蓝含量,从而提高其产量和品质。     

施氮量和土壤灭菌对根结线虫侵染番茄根系的影响

设施蔬菜生产中,根结线虫病害频繁发生,严重威胁了设施蔬菜生产的安全性和可持续性.为了探究氮肥施用量和土壤灭菌对根结线虫侵染番茄根系的影响,采用二因素(施氮量和土壤是否灭菌)二水平完全随机区组设计,进行盆栽试验.施氮量分别为100和300 mg·kg-1,采用γ射线对土壤灭菌或不灭菌.结果表明:未灭菌条件下,与高氮处理相比,低氮处理单位根长和单位根干重的根结数分别减少了42.5%和30.4%,地上部干重和根干重分别增加了43.9%和31.4%,氮素农学利用效率提高4.3倍;对土壤进行γ射线灭菌,有效地消除了根结线虫对番茄根系的侵染,地上部干重增加了31.8%;适当减少氮肥施用量能显著降低根结线虫对设施番茄根系的侵染,促进番茄生长,提高氮素农学利用效率.     

连续施用保水材料对旱作条件下土壤特性及燕麦生长的影响

以坝莜一号为材料,研究连续4a施用保水材料聚丙烯酰胺(PAM)与聚丙烯酸钾(PAM-K),对旱作农田不同土层土壤微生物量变化与相应土层土壤含水量、容重、电导率、养分及燕麦生长的影响。结果表明,旱区农田施用PAM-K和PAM的微生态效应存在时空差异,以连续施用4a效果最佳,其大小顺序表现为连续施用4a施用3a2a1a对照。连续施用4a PAM-K和PAM,0—60 cm土层土壤含水量平均增加了27.18%和34.40%;土壤容重、土壤电导率分别平均降低了2.33%和6.64%、29.50%和22.70%;相对显著增加了耕层土壤养分(有机质、碱解氮、有效磷、速效钾)含量;土壤微生物生物量碳、氮、磷增幅平均达24.11%、31.89%、46.52%和69.96%、35.21%、52.70%,尤其是连续施用4a PAM,10—20cm土层土壤微生物量氮增幅达98.95%及0—10cm、20—40cm土层土壤微生物生物量碳和土壤微生物量磷的增加最明显,增幅分别达31.13%和74.49%、62.27%和49.91%。连续施用4a PAM-K和PAM,植株鲜重、干重、株高、籽粒产量,分别增加了90.53%和146.91%、101.56%和128.13%、33.67%和76.39%、19.27%和22.40%。可见,连续多年施用PAM-K和PAM对施入层(0—20 cm)和近施入层(20—40 cm)改善效果显著;PAM对旱区土壤的适宜性优于PAM-K,可改善土壤质量,提高作物产量。     

丘陵红粘土旱地冬小麦根系生长规律的研究

 对豫西丘陵红粘土旱地小麦根系生长规律进行的研究结果表明：初生根、次生根长度和根条数均随生育期后延而增加,根系最大入土深度可达340cm,根系生物量(Y,kg·hm-2的增长为5次曲线方程：Y＝495.195-40.980X+1.3530X2-0.014985X3+0.0000699X4+0.000000116X5,表现出越冬前和冬后至抽穗期两个增长高峰,各生育期根条数和根系生物量在土体中的分布均符合Y=ae-bx的由上到下的负指数递减方程;土壤含水量与根系生长的关系表现为,当土壤含水量低于16％时,根系和地上部分均不能正常生长,根系入土深度(Y,cm)和根尖处土壤含水量(X,％)的函数关系为：Y＝2.009e0.2204X;次生根的发生与主茎叶片数没有明显的对应关系,而与分蘖的发生相对应,根系干物质积累与地上部分干物质积累存在着正向协同关系;初生根条数增加可显著增加成穗数,次生根条数增加则主要对穗粒数和千粒重有促进作用;用叶面宝、磷酸二氢钾等微肥、激素浸种可有效增加根的数量和根系入土深度,促进根系干物质和地上部分干物质的积累,增加成穗数和穗粒数,显著提高小麦产量。     

模拟喀斯特异质性小生境下三叶鬼针草地上地下协同生长对策

模拟在喀斯特异质生境下,通过随机区组实验,研究三叶鬼针草（Bidens pilosa L.）在两种土壤生境（浅而宽、深而窄）和3种水分处理（对照、减水50%、减水70%）下植物的地上和地下生长关系及生物量分配格局。结果显示：（1）两种生境中三叶鬼针草的地上生长（株高、地径、叶面积、叶生物量）与地下根系生长（根长、根表面积、根体积、根生物量）均随着施水量的减少而降低;叶面积比率随着施水量的减少而增加;根质量比在浅而宽土壤生境中呈先增后减的趋势,而在深而窄土壤生境中呈增加趋势。（2）两种生境中三叶鬼针草的地上生物量与地下根系生物量、叶面积与根长、叶面积与各层根系生长均呈显著正相关关系。但在浅而宽土壤生境中,三叶鬼针草的地上生物量与各土层根系生物量均呈显著正相关,而在深而窄土壤生境中,地上生物量仅与中上土层根系生物量呈显著正相关。研究表明三叶鬼针草在不同生境中均具有较好的地上地下协同生长对策,在增强对地下资源获取的同时也增强了对地上资源的获取。在浅而宽土壤生境中,三叶鬼针草通过协调根系的横向拓展能力与植物叶片的生长来应对快速的干旱缺水;在深而窄土壤生境中,植株能较好地协调根系向下拓展能力与地上叶面积的生长,更好地利用土壤深层的水分资源。     

模拟氮沉降对中亚热带杉木幼树根系生物量的影响

植物根系是全球陆地生态系统碳储量的重要组成部分,在全球生态系统碳循环中起着重要作用,日益加剧的氮沉降会影响根系生物量在空间和不同径级的分配,进而影响森林生态系统的生产力和土壤养分循环。以杉木幼树为研究对象,通过野外氮沉降模拟实验,研究氮沉降四年后对不同土层、不同径级根系生物量的影响。结果发现：（1）低氮和高氮处理总细根生物量较对照均无显著差异（P > 0.05）,高氮处理粗根生物量及总根系生物量较对照分别增加45%和40%（P < 0.05）;（2）与对照相比,施氮处理显著增加20-40 cm与40-60 cm土层细根和粗根生物量,且在低氮处理下,20-40 cm土层细根、粗根在总土层细根与粗根生物量的占比显著提高。（3）与对照相比,高氮处理显著增加了2-5 mm、5-10 mm及10-20 mm径级的根系生物量,低氮处理显著增加2-5 mm、5-10 mm径级根系生物量,且显著降低20-50 mm径级根系生物量。综上所述表明：氮沉降后杉木幼树通过增加较粗径级根系来增加对养分及水分的输送,同时通过增加深层根系生物量及其比例的策略来维持杉木幼树的快速生长;而根系生物量的增加,在一定程度上会增加根系碳源的输入,影响土壤碳循环过程。     

水位和氮浓度对三江藨草幼苗生长和生物量分配的影响

以莫莫格国家级自然保护区常见植物三江藨草(Scirpus nipponicus)为研究对象,设置低(5 cm)、中(35 cm)、高(65 cm) 3个水位和低(4 mmol·L-1)、中(8 mmol·L-1)、高(12mmol·L-1) 3个氮浓度交互的室内控制实验,探究不同水位和氮浓度对湿地植物三江藨草幼苗生长及生物量分配的影响。结果表明:水位对三江藨草幼苗生长、生物量及其分配均产生显著影响(P<0.05),随着水位的升高,三江藨草株高增加,分株数、球茎数及根生物量降低,根茎、球茎、地下、地上和总生物量均呈先增加后降低的趋势;植株地上生物量分配增加,地下(包括根和球茎)生物量分配降低;氮浓度仅对植株株高、球茎数以及地下与地上部分的生物量分配有显著影响(P<0.05),对分株数及生物量的累积均无显著影响(P>0.05);综合三江藨草幼苗的生长特征和生物量累积,认为其生长的最适宜水位为35 cm;且低水位有利于植株对氮的吸收,高水位和高氮浓度限制植株的生长。     

磁处理土壤对油菜幼苗生理生化指标的影响

用室外盆栽方法,将土壤磁效应与生物磁效应相结合,研究磁处理土壤对油菜(Brassica napus)幼苗硝酸还原配活性、可溶性糖含量、根系活力以及生物量的影响．结果表明,200mT磁处理土壤可提高油菜幼苗硝酸还原配活性10．76％,300mT和100mT处理均使可溶性糖含量增加11．05％以上,根系活力增加26．40％．生物量增加,地上部鲜重以300mT处理最大,比对照增加13．28％,地下部的鲜重以200mT处理最大,比对照增加13．17％,根冠比降低10．00％,说明土壤健康质量得到了改善。     

钻井废弃物配合外源有机物质对风沙土理化性质及菠菜生长的影响

采用室内盆栽试验研究水基废弃钻井泥浆、岩屑等钻井废弃物配合腐植酸、木本泥炭等外源有机物质在风沙土中的施用效果,并分析其对菠菜生长的影响,以期为钻井废弃物资源化利用和风沙土改良提供参考。共设3组室内盆栽试验:基础组共4个处理,以风沙土为对照(CK),将风沙土与岩屑按质量比1∶1混合后分别添加0、2%、4%含量水基废弃钻井泥浆(干基);基础组处理分别添加1%腐植酸、1%腐植酸+3%木本泥炭混合物,作为腐植酸组和木本泥炭组。结果表明: 基础组中,与CK相比,施用钻井废弃物显著增加了土壤有机质含量,pH和电导率上升,2%含量水基废弃钻井泥浆显著促进菠菜生长。腐植酸和木本泥炭使土壤pH降低,有机质含量显著增加,电导率上升,腐植酸组株高、总叶面积、鲜重、干重等植物生长指标均高于基础组中对应处理,混合添加腐植酸和木本泥炭后对植物生长促进效果不显著。最佳处理为腐植酸组添加2%含量水基废弃钻井泥浆,土壤有机质含量为13.1 g·kg^-1,播种40 d后菠菜株高、总叶面积、鲜重和干重分别比CK显著增加49.7%、93.4%、83.3%、34.6%。钻井废弃物配合有机物质施用可以显著增加土壤有机质含量,促进菠菜生长,风沙土+岩屑+水基废弃钻井泥浆(2%)+腐植酸(1%)是最佳组合模式。     

外源葡萄糖对山定子生长及根系氮素代谢的影响

以有机质含量仅为0.65%的低碳冲积沙土为栽培基质,以当年生山定子幼苗为试材,分别添加与土壤本体微生物生物量碳(MBC)等量的碳量(2 g·kg^-1)、5倍MBC碳量(10g·kg^-1)的葡萄糖,以不添加葡萄糖为对照,处理后0~30 d内定期采集根系样品,研究外源葡萄糖对低碳土壤中山定子幼苗生长、根系构型及氮素代谢的影响.结果表明:5倍MBC碳源处理后山定子幼苗的株高、总生物量、总根长和根表面积分别显著增加12.3%、26.4%、23.2%和14.6%,而茎粗、根体积和平均直径无显著变化.等量及5倍MBC碳源处理均显著提高了山定子的根系活力,分别在第3和15天达到峰值,高于对照119.1%和75.7%.在整个处理期间,等量及5倍MBC碳源处理显著增加了根中NO_3^-、NO_2^-和NH_4^+含量;整体上,等量及5倍MBC碳源处理均显著增强根系中硝酸还原酶、谷氨酰胺合酶、谷氨酸脱氢酶、谷氨酸合酶、谷草转氨酶和谷丙转氨酶的活性,其中5倍MBC处理的作用最显著.5倍MBC的外源葡萄糖浓度更有利于促进低碳土壤中山定子根系中氮素的吸收代谢过程,诱导植株生长、干物质积累和根系构型改变.     

荒漠草原异质生境下猪毛蒿种群动态

以荒漠草原猪毛蒿种群为对象,设置风沙土、灰钙土和基岩风化沉积土3个生境下增水30%、减水30%和对照3个处理,编制猪毛蒿种群的动态生命表,绘制种群存活和死亡曲线,分析异质生境下猪毛蒿种群动态规律,研究猪毛蒿年内年际间种群动态特征.结果表明: 猪毛蒿种群存活曲线趋于Deevey-Ⅰ型,即生长前期存活率较高,趋于稳定状态,死亡率基本维持在较低的水平,生育期末种群死亡率则上升较快.各生境下猪毛蒿个体的存活数均呈前期波动后期下降的趋势,风沙土和灰钙土生境下死亡率的波动变幅较大,增减水处理对猪毛蒿种群死亡率的影响无显著差异.土壤类型对猪毛蒿株高、冠幅、密度、盖度和生物量均有显著影响,降水处理对猪毛蒿株高、冠幅和盖度影响显著,对密度和生物量无显著影响,而土壤类型和降水处理的交互作用仅对株高和冠幅有显著影响.基岩风化沉积土生境下猪毛蒿生物量的可塑性指数显著高于风沙土和灰钙土,灰钙土和基岩风化沉积土生境下盖度可塑性显著高于风沙土.增水处理的密度可塑性指数显著高于对照和减水处理.株高和冠幅的可塑性指数较高,说明在不同的生境压力下,猪毛蒿可以通过优先调节这两个参数来应对生境的变化.     

Effects of soil compaction and mechanical damage at harvest on growth and biomass production of short rotation coppice willow

The effects of soil compaction and mechanical damage to stools at harvesting on the growth and biomass production of short rotation coppice (SRC) of willow (Salix viminalis L.) were monitored on clay loam (CL) and sandy loam (SL) soils. Moderate compaction, more typical of current harvesting situations did not reduce biomass yields significantly. Even heavy compaction only reduced stem biomass production by about 12% overall; effects were statistically significant only in the first year of the experiment on sandy loam. Heavy compaction increased soil strength and bulk density down to 0.4 m depth and reduced soil available water and root growth locally. Soil loosening treatments designed to alleviate the effects of heavy compaction did not markedly improve the growth of willow on compacted plots. Hence the focus fell on harvesting. Extensive mechanical damage to stools caused a 9% and 21% reduction in stem dry mass on the clay loam and sandy loam soils as a result of fewer stems being produced. The particularly severe effect on the sandy loam soil probably resulted from a combination of dry conditions in the year of treatment, root damage and soil compaction under stools and might have been aggravated by the young age of the plants (1 year) at the time of treatment.     

氮肥运筹对免耕水稻根系生长、根际土壤特性及产量的影响

为探索氮肥运筹对免耕条件下水稻根系生长以及对根际土壤特性、产量的影响,以金优253为材料进行试验。结果表明：平衡施肥显著提高单株根系干重、根长、单株生物量、根半径、单株根表面积、根长密度及根系活力,实收单产高于重穗肥和重基肥处理,且与重基肥差异达95％的显著水平,主要是有效穗数、结实率的增加。平衡施肥显著提高0~10 cm土层的0~2 mm根际土壤有机质、碱解氮含量及脲酶、蔗糖酶活性。因此平衡施肥能明显促进免耕水稻根系生长和有效穗数的增加,对提高水稻产量具有促进作用。     

荒漠草原植物多样性恢复与土壤生境的关系

为揭示荒漠草原围栏封育后植物多样性的恢复对土壤生境的响应机制,以围栏封育和适度放牧草地的灰钙土和风沙土生境植物群落为研究对象,采用方差分析和冗余分析（redundancy analysis RDA）方法,研究了围栏封育后植物多样性的变化及其与土壤生境物理和化学因子的关系。结果表明：（1）相对于适度放牧利用,围栏封育显著降低了灰钙土和风沙土生境植物多样性;随着封育年限的增加,植物多样性呈现显著,且封育的负效应随着封育年限的增加而增加;（2）两种土壤生境下植物多样性与生物量均表现为负相关。植物群落对灰钙土和风沙土两种土壤生境下表现出的不同点有：（1）灰钙土生境下,植物多样性与砂粒正相关,生物量与有机碳,全氮正相关;（2）风沙土生境下,植物多样性与有机碳,全氮正相关,生物量与电导率正相关。未来荒漠草原退化草地植物多样性恢复需要充分考虑不同土壤生境类型的影响,草地管理需要采取适度利用和封育保护相结合道路。     

Effects of Soil Compaction and Meloidogyne incognita on Cotton Root Architecture and Plant Growth

The effects of a soil hardpan and Meloidogyne incognita on cotton root architecture and plant growth were evaluated in microplots in 2010 and 2011. Soil was infested with M. incognita at four different levels with or without a hardpan. The presence of a hardpan resulted in increased plant height, number of main stem nodes, and root fresh weight for cotton seedlings both years. Meloidogyne incognita decreased height and number of nodes for seedlings in 2010. Nematode infestation increased seedling root length and enhanced root magnitude, altitude, and exterior path length in 2010. This was also the case for root length and magnitude in 2011 at lower infestation levels suggesting compensatory growth. A hardpan had no consistent effect on these root parameters but increased root volume in both years. A hardpan hastened crop maturity and increased the number of fruiting branches that were produced, while M. incognita infection delayed crop development and reduced plant height and number of bolls. Both M. incognita infection and a hardpan reduced taproot length and root dry weight below the hardpan in both years. Root topological indices under all the treatments ranged from 1.71 to 1.83 both years indicating that root branching followed a herringbone pattern. The techniques for characterizing root architecture that were used in this study provide a greater understanding of changes that result from disease and soil abiotic parameters affecting root function and crop productivity.     

Biochar and Arbuscular mycorrhizal fungi mediated enhanced drought tolerance in Okra (Abelmoschus esculentus) plant growth,root morphological traits and physiological properties

Drought is a major abiotic factor limiting plant growth and crop production. There is limited information on effect of interaction between biochar and Arbuscular mycorrhizal fungi (AMF) on okra growth, root morphological traits and soil enzyme activities under drought stress. We studied the influence of biochar and AMF on the growth of Okra (Abelmoschus esculentus) in pot experiments in a net house under drought condition. The results showed that the biochar treatment significantly increased plant growth (the plant height by 14.2%, root dry weight by 30.0%) and root morphological traits (projected area by 22.3% and root diameter by 22.7%) under drought stress. In drought stress, biochar treatment significantly enhanced the chlorophyll ‘a’ content by 32.7%, the AMF spore number by 22.8% and the microbial biomass as compared to the control. Plant growth parameters such as plant height, shoot and root dry weights significantly increased by AMF alone, by 16.6%, 21.0% and 40.0% respectively under drought condition. Other plant biometrics viz: the total root length, the root volume, the projected area and root diameter improved significantly with the application of AMF alone by 38.3%, 60.0%,16.8% and 15.9% respectively as compared with control. Compared to the control, AMF treatment alone significantly enhanced the total chlorophyll content by 36.6%, the AMF spore number by 39.0% and the microbial biomass by 29.0% under drought condition. However, the highest values of plant growth parameters (plant height, shoot dry weight, root dry weight) and root morphological traits (the total root length, root volume, projected area, root surface area) were observed in the combined treatment of biochar and AMF treatment viz: 31.9%, 34.2%, 60.0% and 68.6%, 66.6%, 45.5%, 41.8%, respectively compared to the control under drought stress. The nitrogen content, total chlorophyll content and microbial biomass increased over un-inoculated control. The soil enzymes; alkaline phosphatase, dehydrogenase and fluorescein diacetate enzyme activities significantly increased in the combined treatment by 55.8%, 68.7% and 69.5%, respectively as compared to the control under drought stress. We conclude that biochar and AMF together is potentially beneficial for cultivation of okra in drought stress conditions.     

Role of magnesium in combination with liming in alleviating acid-soil stress with the aluminium-sensitive sorghum genotype CV323

An experiment to study the effects of Mg nutrition on root and shoot development of the Al-sensitive sorghum (Sorghum bicolor (L.) Moench) genotype CV323 grown in pots of sandy loam under different acid soil stress is reported. This experiment had a factorial design: four rates of liming were combined with four rates of Mg fertilization. When no Mg was added, the pH of the soil solutions (collected in ceramic cups) increased from 4.0 (unlimed) to 4.2, 4.7 and 5.9 at the increasing rates of liming. After 30 days of growth dry matter yields of the limed treatments were 40%, 115% and 199% higher than that of the unlimed treatment. Without liming and at the highest liming rate, adding Mg did not affect plant biomass significantly. At the two intermediate levels of liming, however, 11.3 mg extra Mg per kg soil increased dry matter yield to the same levels as found at the highest liming rate. Concentrations of Mg in the soil solution rose after Mg was added and fell when lime was added, but adding both Mg and lime increased Mg concentrations in the plant shoots. In plants of the limed treatments, dry matter yield was correlated closely with the Mg concentration in the shoot. This was not so in the unlimed treatment. Furthermore, in the unlimed treatments root development was inhibited, but reduced Mg uptake by the plants resulted mainly from the direct effect of Al- (or H-) ions in the soil solution rather than from impaired root development. It is concluded that Mg fertilization counteracted the interfering effects of Al- and H ions on Mg uptake.     

不同立地类型和土壤类型对"裕丹参"生长和有效成分含量的影响

采用大田种植和盆栽方法,分别研究了不同的立地类型(平地、阳坡、阴坡和坡地)和土壤类型(砂土、壤土和黏土)对产自河南省方城县的"裕丹参"(Salvia miltiorrhiza Bunge)生长和有效成分含量的影响效应.结果表明:在不同立地条件下,"裕丹参"的各项生长和根系产量指标以及根系中丹参酮ⅡA和丹酚酸B含量均有明显差异.随种植时间的延长,平地、阳坡和坡地种植的"裕丹参"单株地上部干质量均逐渐降低,而阴坡种植的单株地上部干质量先升高后逐渐降低;但在不同立地类型下,单株根系干质量和丹酚酸B含量均随种植时间的延长逐渐升高,而丹参酮ⅡA含量则先降低后升高.采收期,平地种植的"裕丹参"的单株地上部干质量、单株根系干质量和鲜质量以及根系鲜产量均最高,平地和坡地种植的"裕丹参"根直径较大,阳坡种植的"裕丹参"根长最长,阳坡和坡地种植的"裕丹参"单株根数、根系中丹参酮ⅡA和丹酚酸B含量也较高,而阴坡种植的"裕丹参"的各项生长和根系产量指标以及丹参酮ⅡA和丹酚酸B含量均最低.在不同类型土壤中,"裕丹参"的根系性状和根系中丹参酮ⅡA和丹酚酸B含量总体上差异显著,其中,用砂土种植的"裕丹参"的根直径、根长、单株根系鲜质量和干质量以及根系中丹参酮ⅡA和丹酚酸B含量均最高,但单株根数最少;用黏土种植的"裕丹参"根系生长总体最差,但单株根数最多;用壤土种植的"裕丹参"根系中丹参酮ⅡA和丹酚酸B含量则最低.综合研究结果显示:"裕丹参"适宜种植于砂土的坡地或阳坡.