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Preliminary bioassay showed that most of title compounds had better herbicidal activity,for example,5a,5b,5c,5e,5f and 5g exhibited more than 80% inhibition to broad-leaved weeds,such as Abutilon theophrasti,Chenopodium album L.,Amaranth...

初步生物活性测定结果表明，该类化合物对阔叶杂草具有较好的芽后除草活性，如5 a、5b、5 c、5 e、5 f、5g等化合物在75 g/hm2剂量下，茎叶处理对苘麻、藜、凹头苋等阔叶杂草的抑制率达80%以上。

The research result as follows. 1. The allelopathic effects of aqueous extract, volatile oil and root exudates of White clover (Trifolium repens L.) were studied on four crops: Abutilon theophrasti Medic., Echinochloa crusgalli L.

研究结果如下： 1、以稗草、反枝苋、苘麻和白三叶草自身为受体，对白三叶草地上部分水浸液、挥发物和根系分泌物的化感作用进行生物测定。

Preliminary bioassay showed that most of title compounds had good herbicidal activity, for example, 9a, 9b, 9c, 9f, 9g and 9h exhibited more than 90% inhibition aganist dicotyledon weeds, such as Abutilon theophrasti Medic and Amaranthus spinosus at an active ingredient 75 g/hm2 in post-emergence treatment.

初步生物活性测定结果表明，该类化合物具有一定的除草活性，如9a， 9b， 9c， 9f， 9g和9h在有效成分75 g/hm2剂量下，茎叶处理对苘麻、刺苋等双子叶杂草的抑制率达90%以上。

The chloroform phase was isolated into 7 phases by column chromatograpathy, and the bioassy showed that the 1 phase has strong inhibitory effect, was 91.01% on Abutilon theophrasti M., root length, 51.35%、63.93%on Echinochloa crusgalli L, seedling length and root length, and the Amaranthus retroflexux L.,germination rate is 0, the secondly was 2 phase and 5 phas, and next we continued iaolated these two phases.

用硅胶柱对氯仿组分进行分离得到7个组分，生物测定表明组分1化感作用最强，对苘麻根长抑制率为91.01%，对稗草芽长和根长的抑制率分别为51.35%、63.93%，反枝苋的发芽率为0；其次是组分2和组分5，由于组分2的含量相对较少，对组分1和组分5继续分离。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离，结果表明，白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解，依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取，生物测定表明氯仿组分对杂草的抑制作用最强，对苘麻芽长和根长抑制率分别为44.32%、88.08%，对稗草芽长和根长的抑制率分别为82.08%、92.16%，反枝苋的发芽率为0；其次是乙酸乙酯相。

Amaranth bread is a kind of health food which is inexpensive and elegant.

实验结果说明籽粒苋面包具有很好的感官质量与营养价值，是极易被广大群众接受的保健食品。

Any of several other plants or their edible seed or fruit, such as buckwheat or grain amaranth .

荞麦其它植物或其可食用的种子或果实，如荞麦或苋属作物

The advantage plant communities were Setaria viridis community, Setaria viridis + Amaranthus spinosus community, Sesamum indicum community and Cynodon dactylon community that mainly distributed within an altitude range of 156-150 m above sea level.

结果］三峡库区消落带植物约16科27种，种类最多的科为禾本科和菊科，优势种群为狗尾草、刺苋、芝麻和狗牙根，优势植物群落为狗尾草草丛、狗尾草＋刺苋草丛、芝麻草丛、狗牙根草丛，主要分布在水位156~150 m消落带。

The differences of capability enrichment in potassium were very significant between different species of grain amaranths grown on deficient potassium soil after 60 days of seeding and in water culture after transplanting 30 days.

中文题名籽粒苋富钾营养机理研究副题名外文题名 The nutrition mechanism of grain amaranth enrichment in potassium 论文作者李廷轩导师马国瑞学科专业植物营养学研究领域\研究方向学位级别博士学位授予单位浙江大学学位授予日期2003 论文页码总数126页关键词钾营养植物营养富钾基因型籽粒苋馆藏号BSLW /2003 /Q949 /47 1。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。