查询词典 weed control

Although we have achieved great progress in the general control of the weed, there are also some serious problems in the harms of the weed, succession, drug-fast and the pollution of the herbicide.

农田杂草与农作物间进行着剧烈的竞争，表现在很多杂草根深叶茂，特别是旱区杂草根部深扎土中，对水分的吸收常大于作物。

The spraying control system aiming at weed based on machine vision was designed and developed. The index of 2G-R-B is used for segmentation and the method of improved pixel lateral histogram is used for extracting the center of crop row,the method of threthold is also used for identificating between-row weed and BP ANN based on fratal and texture is used for identificating in-row weed. PLC correspondence and performing procedure is desi -gned and developed.

设计和开发了基于机器视觉的麦田除草剂对准喷药控制系统，该系统的视觉子系统首先用过绿的2G-R-B进行植物与土壤背景的分割，其次用改进像素直方图法识别作物中心行，用阈值法识别行间杂草区域，用BP神经网络基于分形和纹理的共同特征识别行内杂草区域，设计并开发了计算机与PLC的通信程序，设计了PLC的运行程序。

The potential use for every pathogen in biological control are aluated and the feasibility of biological control of weed with plant pathogens is discussed from the view of ecological epithytology, and it is advanced that Helminthosporium nodulosum is a very hopeful biological fungus.

对每种病原菌在杂草生防上的应用前景给予了评价并从植病流行的生态学观点探讨了利用杂草植物病原菌开展杂草生防的可行性。

Analyzed the control effects of weeding of 30 %"Feida" roundup soluble powder in nursery. The results indicated that its optimum usage quantity is 3.0 kg/hm2 in the land of Syzygium aromaticum, above 3.7 kg/hm^2 in the land of Picea crassifolia and Sabina przewalskii and the control effect of weed reached over 70%.

分析了在苗圃地使用30％飞达草甘膦可溶性粉剂防除杂草试验，结果表明：使用30％飞达草甘膦可溶性粉剂的最佳剂量丁香苗圃地为3.0kg／hm^2，除草效果可达到80％以上；青海云杉和祁连圆柏苗圃地为3.7kg／hm^2以上，除草效果可达到70％以上。

When the mevinphos was utilized for a long time in highland barley field, the young-root of next-season cole shortened 1.9~2.0cm and fresh weight decreased 0.13~0.14g per individual plant compared with the control. Low-tillage in time after autumn-harvest showed that the weed seeds in the ground surface were harrowed into the tilth of 0~10cm. Early-low-tillage in spring-sow of the next year induced weed seeds of soil surface to germinate and come out ahead. After 10 days, tillage-sow can decrease about 40% weeds. Compared to the normal plough-row, direct late-tillage-row was postponed 10 days, and can decrease about 30% weeds. In the seedling period or later, rudimental weed seeds were handled with a hoe, which led to better cure and control effects and had more benefits to the young seedling growth and yield of the next-season crop.

研究结果表明：氟乐灵在油菜田长期使用时，土壤残留农药抑制下茬青稞幼根生长，幼根较对照株缩短3.0~3.1cm/株，鲜重量减少0.19~0.20g/株；甲磺隆在青稞田长期使用时，下茬油菜幼根较对照株缩短1.9~2.0cm/株，鲜重量减少0.13~0.14g/株；秋收后及时浅耕可将落入地表的杂草种子全耙入0~10cm耕层内；翌年春播早浅耕可诱发土壤表层的杂草种子提前萌发出苗，10d后耕种，能防除40%左右的杂草株数；较正常播种期推迟10d后直接晚耕播种，可防除30%左右杂草株数；苗期或后期拔出残余杂草种子时，除草效果理想，对下茬作物幼苗生长发育及产量无任何不良影响。

The infrared-transmitting mulches provide the weed control properties of black mulch and are intermediate between black and clear mulches in terms of increasing soil temperature.

红外线透性薄膜有黑色薄膜那种控制杂草的特性，在增加土壤温度方面介于黑色与透明薄膜之间。

Plugs should be planted in rows six to 12 inches apart in inch-deep holes, Plugs should be raked and rolled, and while the plugs become established and grow together, special attention should be paid to weed control.

插头应行种植六英寸到12英寸外，深洞，插头应倾斜和钢材，虽然插头成为建立和发展起来，特别要注意的控制杂草。

Terpenoid compounds from aromatic plants have been found to inhibit asparagine synthetase. Chemically synthesized 1,4-cineole derivatives display a degree of weed control activity.

在芳香族植物中发现单萜化合物有抑制天冬酰胺合成酶的作用，化学合成1，4-桉树脑衍生物也有一定除草活性。

It therefore implies that white clover intercropping and straw mulching are effective ecological weed control measures.

结果表明两种生态控草处理措施能改变茶园杂草群落结构，有效控制杂草的生长。

Methyl bromide substitutes for weed control in annual and perennial crops.

甲基溴化物替代物对每年和多年生杂草的控制。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。