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CHANGES IN SOIL BIOLOGICAL PROPERTIES WITH THE ADDITION OF METSULFURON-METHYL HERBICIDE 总被引：1，自引：0，他引：1
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍａｉｎｔｅｎａｎｃｅｏｆｓｏｉｌｆｅｒｔｉｌｉｔｙｄｅｐｅｎｄｓｏｎｔｈｅｓｉｚｅａｎｄａｃｔｉｖｉｔｙｏｆｓｏｉｌｍｉｃｒｏｂｉａｌｂｉｏｍａｓｓ(Ａｌｅｘａｎｄｅｒ,1 977) ,ｗｈｉｃｈｉｓｏｆｆｕｎｄａｍｅｎｔａｌｉｍｐｏｒｔａｎｃｅｉｎｔｈｅｂｉｏｌｏｇｉｃａｌｃｙｃｌｅｓｏｆａｌｍｏｓｔａｌｌｍａｊｏｒｐｌａｎｔｎｕｔｒｉｅｎｔｓ (ＲｏｂｅｒｔａｎｄＣｈｅｎｕ ,1 992 ) .Ａｌｔｈｏｕｇｈｔｈｅｓｏｉｌｍｉｃｒｏｂｉａｌｂｉｏｍａｓｓｒｅｐ ｒｅｓｅｎｔｓｏｎｌ… 相似文献
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2,3,5—三碘苯甲酸(Triiodobenzoic Acid, TIBA)是高活性的植物生长调节剂。在大豆初花期,每亩仅喷施3—5g,即可对大豆有矮化壮秆、保花保荚、提高光合效率和呼吸强度,从而增加产量的作用。根据试验,喷施TIBA可使大豆增产10％左右,若同时配用ppm浓度的钼、硼和锌等微量元素,则可增产20％左右。它对马铃薯、花生等也有一定的增产效果。因此,我们在实验室进行了合成小试,并改进了传统方法,在室温(30—40℃)下合成了它。这不仅可以砍掉冷冻设备,而且大大缩短了反应周期,降低了产品成本。 TIBA按以下途径合成: 相似文献
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A 21-day laboratory incubation experiment was conducted to investigate the impact of pesticides (insecticide, herbicide, fungicide)
on paddy field soil health under controlled moisture (flooded soil) and temperature (25°C) environment. The electron transport
system (ETS)/Dehydrogenase activity showed negative correlation with pesticides concentrations, decreased with increase of
pesticide concentration. The higher doses (5 to 10 times field rates) of pesticides significantly inhibited ETS activity,
while lower rates failed to produce any significant reducing effect on the control. The toxicity of pesticides in decreasing
the ETS activity was in the order: insecticide > fungicide > herbicide, irrespective of their rates of application. The pesticides
increased the soil phenol content, which increased with increasing concentration of agrochemicals. The pesticide application
did not produce any significant change in soil protein content. The response of biomass phospholipid content was nearly similar
to that of ETS activity. The phospholipid content decreased with the addition of pesticides in the order insecticide > fungicide
> herbicide and the toxicity was in the order: 10 FR (field rate) > 5 FR > 1.0 FR > 0.5 FR > control.
Project (No. G1999011809) supported by the National Key Basic Research Foundation (973) of China
Ph. D. student at Zhejiang University, from Ministry of Agriculture (Punjab), Government of Pakistan 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｓｅｒｉｃｕｌｔｕｒｅｅｃｏｓｙｓｔｅｍｏｆｔｈｅＨａｎｇ Ｊｉａ ＨｕｄｉｓｔｒｉｃｔｉｎＺｈｅｊｉａｎｇＰｒｏｖｉｎｃｅｈａｓｂｅｅｎｓｅｒｉ ｏｕｓｌｙｐｏｌｌｕｔｅｄｂｙｆｌｕｏｒｉｄｅｓｉｎｃｅ 1 982 .Ｗｉｄｅｌｙｄｉｓｔｒｉｂｕｔｅｄｓｉｌｉｃａｔｅｉｎｄｕｓｔｒｉｅｓ,ｓｕｃｈａｓｂｒｉｃｋ ,ｃｅ ｒａｍｉｃ ,ｆｉｒｅｐｒｏｏｆｍａｔｅｒｉａｌ,ａｎｄｃｅｍｅｎｔｐｒｏｃｅｓｓｉｎｇｉｎｄｕｓｔｒｉｅｓｗｈｉｃｈｍａｋｅｔｈｅｉｒｐｒｏｄｕｃｔｓｕｓｉｎｇｖ… 相似文献
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This study on the effect of land use on soil quality in relation to forms and toxicity of aluminum in red soils (Ultisol) in southeast China showed that in general, the extractable order for soil active aluminum by four extractants was: NaOH 0.5 mol/L > HCl 1 mol/L > NH4Ac 1 mol/L > KCl 1 mol/L . Different uses of the red soils, developed from Quarternary red clay with the similar hydrogeological environment, greatly affected the amount of active aluminum, especially the exchangeable Al3+. The order of exchangeable Al3+ (Al mg/kg) in the red soils with different land uses was: barren land (740) > tea garden (663) > peach garden (432) > citrus garden (234) > paddy soil (127). The content of water soluble aluminum in the red soils was highly sensitive to soil acidity. 相似文献
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研究了浙江省14种主要土壤中砷的赋存形态和含量,考察了土壤中水溶性砷、钙型砷、铝型砷、铁型砷和闭蓄型砷与土壤本性的关系,得出了估算各种形态砷的方程式. 相似文献
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