Study on chemical control experiment of barnyard grass in white clover filed of lawn

A study on the effect of barnyard grass on output loss of late rice

稗草影响后季稻产量预测式的研究

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The dominant weeds in paddy field were Echijnochioa crusgalli and Leersia oryzoides.

水稻田优势杂草主要是稗草和稻李氏禾；

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The Study on Bioassay for Rice Allelopathy to Barnyardgrass

水稻对稗草的化感作用研究水稻对稗草化感作用的生物测定

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Induction of the Dormant Barnyardgrass Seeds Germination by Butachlor

丁草胺诱导稻田休眠稗草种子萌发的作用

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Anatomical study of mutual restraint between rice and barnyardgrass

水稻与稗草相抑制的解剖研究

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Mechanism of barnyardgrass interference in nitrogen fixation of soybeans& water interference mechanism

稗草影响大豆根瘤固氮的机制研究之一&水分干扰机制

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Constraining Effect of Rice Type and Density on Barnyardgrass Growth

不同类型和种植密度的水稻对稗草生长的抑制效应

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Allelopathic Effects of Aqueous Extract from Rice on the Growth of Barnyardgrass

化感水稻不同组织水浸提液对稗草的化感作用

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Study on Biological Activation of Barnyard-grass and Security of Rice

尿素与3种酰胺类除草剂混用对稗草活性和水稻安全性研究

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A Study on Vasey Grass Yield, Nutritive Value and Foraging Effect

雀稗草产草量、营养价值及饲喂效果的研究

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Interaction of Barnyardgrass and Water Stress on Nitrogen Fixation of Soybean

稗草和水分胁迫对大豆植株根瘤固氮速率的交互影响

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Add butachlor 200 mL/ hm2 to the Water extraction with one hundred ml of distilled water was added to 25 grams of fresh rice leaf sample, the inhibitory effect on barnyardgrass was improved, especially to the barnyardgrass roots.

150mL蒸馏水提取25g新鲜叶片的水提液培养稗草，加入200mg/L丁草胺溶液后，对稗草根抑制效果表现显著的增效作用，尤其对芽明显。

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Were tested in this paper. Seed germination experiment showed that the culture filtrate from isolate F 8 strongly inhibited seed germination, root and stem growth of all three weeds used.

种子萌发抑制试验结果表明，F-8菌株的培养滤液不仅对反枝苋、稗草、狗尾草种子萌发有很强的抑制作用，而且对它们的根、茎生长抑制也很强；

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Pollen grains germinated and pollen tubes penetrated stigmas normally, and the number of pollen grains being condensing or releasing their inclusions or having released them increased with the time after self pollination during experimental period.

稗草自花授粉后花粉粒萌发生长正常，在30min时85%的花粉粒花粉管穿过柱头，正在凝缩和释放内容物或内容物已经释放的花粉粒百分率逐渐增加；

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Barnyardgrass has a peak for germination at 5-15 d after rice seeded, other weeds at 10-20 d, and all weeds stop to emergence at 25 d.

稗草出草高峰在水稻播种后5～15d，其它杂草出草高峰在水稻播后10～20d，25d后杂草停止出苗。

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Results show that root biomass, root volume, root length and root diameter of rice and barnyardgrass all increased significantly under FACE condition with NN ( normal nitrogen) supply, the response of rice to CO_2 was higher than that of barnyardgrass.

结果表明，常N水平下高浓度CO2显著增加水稻和稗草的根干重、根体积、根总长和根直径，水稻对CO2浓度升高的响应强于稗草；

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Under the condition of the non-competition, The plant height, the weight of the plant aerial part, the root length, the root weight and the breadth of leaf of sensitive biotype barnyardgrass is better than that of two resistant biotypes.

在非竞争条件下，敏感性生物型稗草S在植株高度、植株鲜重、根长、根鲜重和叶片宽度方面都明显高于抗药性生物型稗草R。

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And inhibitory effects of all entries on barnyardgrass root-length and shoot-height showed continuously variant, implying that allelopathy is a quantitative character.

通过琼脂迟播共培法考察了水稻RIL各家系及亲本的化感作用，结果表明，各家系对稗草的根长和茎长抑制率呈连续变异，证明了化感作用是数量遗传性状。

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FACE condition with LN ( low nitrogen) supply did not significantly promote rice growth because of N stress, but response of barnyardgrass to CO_2 was not limited by N stress, showing significant increase in growth.

低N胁迫时，高浓度CO2显著增加稗草的根干重、根体积和根总长，而对水稻生长无明显促进作用。

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Elevated CO_2 also decreased remarkably the number of root hair and per-unit dry root weight of rice and barnyardgrass, which might be one of morphological reasons why root activity decreased under FACE condition.

高浓度CO2显著降低水稻和稗草单位根重根毛数，这可能是CO2浓度升高条件下根系活力显著降低的形态学原因之一。

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