共查询到20条相似文献，搜索用时 15 毫秒
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试验详细研究了不同施肥处理对旱柳各器官内矿质元素含量的影响规律,以期为旱柳育苗中科学合理施肥提供理论依据。试验在田间条件下,设置不施肥(T1,对照)、化肥(T2)、猪粪(T3)、生物有机肥(T4)4个处理,3次重复。结果表明:T4处理的根茎枝叶锌含量比对照提高了1.68mg/kg、2.74mg/kg、2.55mg/kg、5.68mg/kg,锰含量提高了0.47mg/kg、2.59mg/kg、2.11mg/kg、5.78mg/kg,钾含量提高了4.27mg/kg、8.92mg/kg、5.04mg/kg、4.93mg/kg,磷含量提高了0.22mg/kg、0.65mg/kg、0.35mg/kg、0.50mg/kg,氮含量提高了3.65mg/kg、3.00mg/kg、3.20mg/kg、3.50mg/kg,差异显著。综合分析认为,T4对改善旱柳营养状况效果最佳。 相似文献
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三明小湖赤枝栲林地部分矿质元素及土壤理化性质研究 总被引：1，自引：0，他引：1
分析测定福建三明小湖赤枝栲林部分矿质元素及土壤理化因子 ,结果表明 :该地区土壤 pH值为 4 2 4 ,全N平均含量为 0 0 84 2 % ,全P(P2 O5% )为 0 0 15 5 % ,有机质为 3 7874 %。该地土壤的全N、全P和有机质均不高。该地区土壤Mg元素含量为 6 2 6 0 4 4mg kg-1,Ca为 15 6 5 88mg kg-1,Mn为 80 4 4 4 3mg kg-1,Fe为 2 6 179 6mg kg-1,Co为 3 3335mg kg-1,Ni为12 94 6 7mg kg-1,Cu为 15 2 95 3mg kg-1,Zn为 2 6 9116mg kg-1,Mo为 0 4 6 4 1mg kg-1,Cd为 0 0 4 70mg kg-1,Pb为 9 786 5mg kg-1。土壤矿质元素中 ,Ca、Fe含量偏高 ,Mn含量偏低 相似文献
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对桂西南地区的那坡县不同生产水平的八角林的52个林地土壤养分进了测定,结果表明:土壤pH值平均为5.5;有机质、全N、全P、全K平均含量分别为26.1 g/kg、1.60 g/kg、0.86 g/kg、15.58 S/kg;土壤速效N、P、K、有效Cu、Zn、Mn、B等养分平均含量分别为154.0 mg/kg、1.14 mg/kg、72.77 mg/kg、1.60 mg/kg、2.23 mg/kg、6.03 mg/kg、0.24 mg/kg.该地区八角林土壤pH值在4.1～6.8范围,适宜八角生长,有机质、全N、全K在中低水平,全P、速效P、速效K处在缺乏状态,速效Cu、Mn、B、Zn均较缺乏.在生产中要采用测土配方施肥措施,平衡N、P、K与微量元素间的比例,以促进八角林的高产稳产. 相似文献
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The aqueous root extract of Lecaniodiscus cupanioides was used to study the central nervous system depressant activity pattern of the plant. The extract protected mice from strychnine-induced convulsion at 400 mg/kg p.o. and 100 mg/kg i.p. A dose-dependent prolongation of seizure latency was produced at 400 mg/kg, p.o. and 100 mg/kg i.p. for strychnine-induced seizure; and at 400 mg/kg p.o. and 100 mg/kg i.p. for picrotoxin-induced seizure. Moreover, the CNS depressant activity of the extract (200 mg/kg p.o. and 50 mg/kg i.p.) was demonstrated by a significant prolongation of 40 mg/kg, pentobarbitone sleeping time, and significant reduction in exploratory behavior of mice at a dose of 400 mg/kg p.o., with both effects comparable to effects produced by 4 mg/kg chlorpromazine. Acute oral toxicity test, up to 14 days, did not produce any visible signs of toxicity; however, acute (24 h) i.p toxicity test produced a dose-dependent mortality with LD50 of 455.2 mg/kg. 相似文献
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研究了不同氮素水平(16.0、6.0、0.5、0 mg/kg)没顶全淹、冠层半淹和根部渍水对枫杨光合作用的影响,结果表明,淹水使枫杨叶片的净光合速率(Pn)显著下降,但高氮(16.0 mg/kg)和中氮(6.0 mg/kg)淹水胁迫下枫杨叶片净光合速率的降幅明显低于低氮(0.5 mg/kg)和对照(0 mg/kg);淹水胁迫下,枫杨叶片的非光化学淬灭系数(qN)随氮水平的提高而降低,而光化学荧光淬灭系数(qP或qL)则相反。试验结果说明富氮可缓解淹水对枫杨叶片光合作用的胁迫损害。 相似文献
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选用4种常见的市售蜂蜜,采用原子吸收分光光度法测定其钙、镁、铜、铁、锌、锰6种微量元素的含量(mg/kg)。实验结果表明,4种蜂蜜当中微量元素含量丰富,其中钙元素含量34.2~54.60mg/kg,镁元素含量在9.54~10.72mg/kg,铜元素含量1.28~7.22mg/kg,铁元素含量23.86~51.39mg/kg,锌元素含量1.56~2.73mg/kg,锰元素含量2.63~3.07mg/kg。此法回收率96.4%~103.8%,标准偏差0.06%~0.63%。 相似文献
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3种外源激素对金露梅嫩枝扦插的影响 总被引：2，自引：0，他引：2
研究了不同生长激素种类、浓度处理对金露梅嫩枝扦插插穗生根的影响。结果表明,500 mg/kg的ABT处理的插穗生根率最高,500 mg/kg的NAA和1 000 mg/kg的IBA处理的发生不定根数量最多,1 000 mg/kg的NAA处理的不定根最长。综合分析发现,3种外源激素处理对金露梅插穗生根都有明显的影响,500~1 000mg/kg浓度范围对插穗生根起到良好的促进作用,而250 mg/kg和2 000 mg/kg效果较差。 相似文献
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Evaluation of analgesic, anti-inflammatory and hepatoprotective effects of lycorine from Sternbergia fisheriana (Herbert) Rupr 总被引：1，自引：0，他引：1
The present study reports the potential antinociceptive, anti-inflammatory and hepatoprotective activities of lycorine from Sternbergia fischeriana (Herbert) Rupr. (Amaryllidaceae). Lycorine was evaluated on mice by using acetic-acid induced writhing and tail-flick tests. Lycorine exhibited stronger inhibition than aspirin in acetic-acid induced abdominal stretching at 1.0 mg/kg dose. Lycorine also showed antinociceptive activity at 1.0 mg/kg dose in tail-flick test. The anti-inflammatory activity of lycorine was not found to be significant at dose of 0.5 mg/kg. However, at doses of 1.0 mg/kg and 1.5 mg/kg, i.p. showed a significant reduction with 53.45% and 36.42%, respectively in rat paw oedema induced by carrageenan against the reference anti-inflammatory drug indomethacin (3 mg/kg, i.p.) (95.70%). The ED50 of lycorine was determined as 0.514 mg/kg. Hepatoprotective activity of lycorine on carbon tetrachloride (CCl4) induced acute liver toxicity following biochemical parameters were also evaluated. Rats were treated with lycorine at doses of 1.0 mg/kg and 2.0 mg/kg, i.p. Results of biochemical tests were confirmed by histopathological examination. Lycorine exhibited significant hepatoprotective effect at dose of 2.0 mg/kg i.p. dose. 相似文献
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云南13种乡土绿化树种对SO2、NO2气体反应的研究 总被引：5，自引：0，他引：5
采用人工模拟熏气的方法,研究了13种云南乡土绿化树种对城市SO2、NO2有害气体的反应.结果表明云南红豆杉、长梗润楠、翠柏、滇润楠、麻栗坡含笑、南亚含笑、山玉兰对SO2气体的抗性弱,而云南含笑、脉叶虎皮楠、川滇三角枫对SO2气体的抗性最强,灯台树、川滇三角枫净化SO2的能力较强,其净化量分别为300mg·kg-1、700 mg·kg-1.NO2浓度为1.0 mg·m-3时,长梗润楠、云南含笑、云南拟单性木兰、云南红豆杉、麻栗坡含笑、灯台树叶片的N净化量依次为2 000 mg·kg-1、1 100 mg·kg-1、1 700 mg·kg-1、2 300 mg·kg-1、1 200 mg·kg-1、13 100 mg·kg-1.经综合比较川滇三角枫对SO2气体具有较好的抗性和净化能力,而对NO2气体具有较好的抗性;云南含笑、云南拟单性木兰、脉叶虎皮楠等树种对SO2、NO2气体具有较好的抗性和净化能力. 相似文献
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苦竹属竹叶多糖、蛋白质及叶绿素比较研究 总被引：1，自引：0，他引：1
对苦竹属苦竹、宜兴苦竹、川竹、斑苦竹、杭州苦竹、高舌苦竹、垂枝苦竹、衢县苦竹、丽水苦竹及实心苦竹等10种竹种竹叶多糖、蛋白质及叶绿素等化学成分进行了分析比较。结果表明,10种竹叶中多糖、蛋白质及叶绿素含量丰富,竹叶多糖含量均在600 mg/kg以上,竹叶蛋白质含量在127.55~182.24 g/kg之间,竹叶叶绿素总含量均在1 600 mg/kg以上,叶绿素a的含量大于叶绿素b的含量。苦竹竹叶多糖及蛋白质含量最高,分别为843.29 mg/kg及182.24 g/kg;川竹竹叶叶绿素总含量和叶绿素a含量最高,分别为3 339.24 mg/kg和2 390.97 mg/kg,实心苦竹竹叶叶绿素b含量最高,为949.54 mg/kg。研究结果为苦竹属竹叶化学成分基础研究和苦竹属竹叶资源的综合利用提供了理论基础。 相似文献
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浙江省金针菇重金属背景值及质量安全评价 总被引：1，自引：0，他引：1
在浙江省金针菇主要生产基地、超市和农贸市场实地抽样检测,对数据进行统计分析,首次提出了浙江省金针菇重金属背景值.研究结果显示,浙江省金针菇重金属元素背景值为:铅0.083mg/kg、镉0.013mg/kg、汞0.008mg/kg、砷0.020mg/kg.该背景值为实地抽样检测,来源明确,样本分布具有代表性,分析方法和结果可靠.经与相关标准进行比较,表明浙江省金针菇重金属含量相对较低,金针菇质量处于安全水平.基地与市场金针菇重金属元素含量相近,各地市金针菇重金属元素含量存在一定差异,特别是铅和镉,可能与栽培基质和技术相关. 相似文献
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Effect of roots aqueous extract of Delphinium denudatum on morphine-induced tolerance in mice 总被引：1，自引：0，他引：1
The aqueous extract of Delphinium denudatum (Dd) roots showed a significant effect against morphine- (10 mg/kg) induced tolerance and dependence in mice. Oral administration of the extract (200-1600 mg/kg) showed a significant dose-dependent inhibition of naloxone- (1 mg/kg) induced withdrawal. 相似文献
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浙江省蘑菇重金属背景值及质量安全评价 总被引：1，自引：0，他引：1
在浙江省的蘑菇生产基地、超市和农贸市场对蘑菇进行实地抽样检测,并对数据进行统计分析,提出了浙江省蘑菇重金属背景值.研究结果显示浙江省鲜蘑菇重金属背景值为铅0.144 mg/kg、镉0.026 mg/kg、汞0.038mg/kg、砷0.085 mg/kg,该背景值为实地抽样检测,来源明确,样本分布具有代表性,分析方法和结果可靠.经与相关标准进行比较,表明浙江省蘑菇重金属含量处于相对较低的水平.蘑菇的重金属含量明显高于一般蔬菜,特别是砷和汞,应作为质量安全控制的重点,在生产种植中要对栽培料中的重金属含量水平进行控制. 相似文献
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The chloroform extract of Leucas lavandulaefolia at an oral dose of 200 mg/kg and 400 mg/kg exhibited a significant protection on D(+)galactosamine induced liver damage in rats. Silymarin (25 mg/kg), a known hepatoprotective drug used as a standard also exhibited a significant activity. 相似文献
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The suspensions of chloroform extract of leaves in 0.3% carboxy methyl cellulose (CMC) was evaluated for hepatoprotective activity in Wistar albino rats by inducing hepatic injury with d-galactosamine (400 mg/kg). The chloroform extract of Polygala arvensis at an oral dose of 200 mg/kg and 400 mg/kg exhibited a significant (P<0.001, P<0.01 and P<0.05) protection effect by normalizing the levels of aspartate amino transferase (ASAT, GOT), alanine amino transferase (ALAT, GPT), alkaline phosphatase (ALP), total bilirubin (TB), lactate dehydrogenase (LDH), total cholesterol (TC), triglycerides (TGL), albumin, total protein (TP) which were significantly (P<0.001) increased in rats by treatment with 400 mg/kg i.p. of d-galactosamine. Silymarin (25 mg/kg), a known hepatoprotective drug used for comparison exhibited significant activity (P<0.001). 相似文献
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Hepatoprotective (HP) activity of Vitex negundo (VN) leaf ethanolic extract was investigated against hepatotoxicity (HT) produced by administering a combination of three anti-tubercular drugs isoniazid (INH)-7.5 mg/kg, rifampin (RMP)-10 mg/kg and pyrazinamide (PZA)-35 mg/kg for 35 35 days by oral route in rats. V. negundo leaf ethanolic extract was administered in three graded doses of 100, 250 and 500 mg/kg orally, 45 min prior to anti-tubercular challenge for 35 days. HP effect of V. negundo leaf ethanolic extract was evident in the doses of 250 and 500 mg/kg as there was a significant decrease in TB, AST, ALT and ALP levels in comparison to control. Histology of the liver section of the animals treated with the V. negundo leaf ethanolic extract in the doses of 250 and 500 mg/kg further confirms the HP activity. 相似文献
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采用营养液培养和盆栽方式,研究硒处理对四叶参氮磷钾吸收积累的影响。结果表明,硒对四叶参幼苗、成株的氮磷钾吸收和干物质积累影响不同。在0～1.5mg/kg范围内,随硒处理浓度增加,四叶参幼苗干物质和氮磷钾积累量逐渐增加,以1.5mg/L处理最佳,2.0mg/kg硒处理四叶参幼苗干物质积累与对照差异不显著;盆栽条件下一年生四叶参植株则在1.0mg/kg处理最佳,2.0mg/kg硒处理四叶参生长过程中逐渐死亡。表明不同栽培方式影响硒对四叶参氮磷钾吸收和干物质积累,盆栽以1.0mg/kg硒处理最佳。 相似文献