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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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黄昌勇 《信阳师范学院学报(哲学社会科学版)》1990,(2)
《黛依丝》系法国作家法朗士的代表作之一。这部小说对二、三十年代的中国文坛发生过较大的影响,而且直接影响到现代作家施蛰存创作中篇小说《鸠摩罗什》(载《新文艺》1929年9月号)。这种影响曾引起评论者关注,新时期以来的现代文学研究者也做过一些研究,但对这两部作品进行的比较研究还不够。本文从比较的角度进行一些探讨。 《鸠摩罗什》与《黛依丝》在取材上确实表现出惊人的相似。他们的笔下都塑造了一位大智僧人。巴弗奴斯是基督教传说中的一名著名隐修士,据传他曾感化了埃及名妓黛依丝。鸠摩罗什据史载是我国著名四大佛经翻译家之一。而两位作家不是依照传说或史实给这两位信徒树碑立传,却把他们放在人世之中,注以血肉,灌以世俗之情感。无论是基督教传说中的信徒或是“深解法相、善娴阴阳”的大佛学家,在作者的笔下都属终生挣扎于灵肉冲突泥潭 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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正教育永远是一个社会关注的对象。举凡"校车"、"盒饭"、"学费"、"择校"等无不成为一个个重要的话题。近日,沪上媒体刊登了这样一则也许并不引人注意的新闻:上海市质监局抽查学生校服,抽样合格率48.78%.创5年来新低。不合格产品中,甲醛含量不合格1批,起毛起球 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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黄昌勇 《信阳师范学院学报(哲学社会科学版)》1993,(2)
现有的中国新文学史著作,对胡也频的诗歌创作是忽视的.事实上,二十年代中后期,胡也频就以其大量的诗作引起北方沉寂诗坛的关注,有学者称誉他的诗作“作为近代新诗新型之一种”,“以离奇的风格,造成一种新的趣味”.①从三十年代至今,对胡也频的诗作或存在着片面的解释,如郑振择在诗人牺牲不久撰文认为,他的诗中找不到“一丝半毫的反抗时代的影子”,这种“绅士式”的创作表明作家“似乎还没有尝到任何真实的人间生活的辛辣味儿;”②或较多注目于诗人创作受启于李金发象征派诗的因子.造成这种情况的缘由,一方面是胡也频的诗作大多刊载于《现代评论》等刊物,自然不会引起左翼文学界的注目,因而 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＡｇｒｉｃｕｌｔｕｒａｌａｃｔｉｖｉｔｉｅｓａｎｄｈｕｍａｎｉｎｄｕｓｔｒｉａｌｉｚａｔｉｏｎｉｎｃｒｅａｓｅｒｅｌｅａｓｅｏｆｈｅａｖｙｍｅｔａｌｓｉｎｔｏｔｈｅｅｎｖｉｒｏｎｍｅｎｔ.Ｓｉｎｃｅ,ｈｅａｖｙｍｅｔａｌｓｒｅａｄｉｌｙａｃｃｕｍｕｌａｔｅｉｎｓｏｉｌ,ｔｈｅａｍｏｕｎｔｉｎｓｏｉｌｉｓｌｉｋｅｌｙｔｏｃｏｎｔｉｎｕｅｔｏｉｎｃｒｅａｓｅ.Ｔｈｅｍｅｔａｌｓｉｎｓｏｉｌｈａｖｅｄｅｌｅｔｅｒｉｏｕｓｅｆｆｅｃｔｓｏｎｔｈｅｍｅｔａｂｏｌｉｓｍｏｆｔｈｅｓｏｉｌ… 相似文献
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A series of laboratory and pot experiments carried out to examine the role of soil microbial biomass in red soils' nitrogen availability and productivity showed that soil available N (NA), dry matter yield (DMY) of ryegrass, and plant uptake of nitrogen were each closely correlated with microbial biomass-C (Cmic) or -N (Nmic), suggesting that soil microbial biomass is a very important nitrogen pool available to plants in red soils. After correction for the substrate effect, the computed turnover of the Nmic in three tested soils ranged from 63 to 250 days. Soils with low Nmic or light texture generally had higher Nmic turnover rate than those with high Nmic or heavy texture. These results showed that soils with low Nmic, microbial biomass could also play an important role in the availability of nitrogen to plants due to these soils' high turnover rate. 相似文献
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黄昌勇 《辽宁师范大学学报(社会科学版)》2001,24(3):75-76
左联研究中存在着几个重要问题，主张应当有严格意义上的左联学的学术概念，认为重要学史料的搜集整理，现代学及左翼的史料建设应当得到学术性的认可，在左联研究中要注意学评价与学史评价的区分与联系。 相似文献
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戴望舒是中国现代主义诗歌的代表诗人之一，准确地把握其位置成为戴望舒研究中的重要课题。张新生先的新《戴望舒：一个边缘化型诗人》，全面，周详地阐释了戴望舒的化品格，诗学特征及其历史流变，是戴望舒研究的重要收获。 相似文献
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