棉花

In greenhouse the pathotype of 41 strains of Vertwilltum dahliae of cotton were studied by maculating the seedlings of 4 different cotton cultivars, EjingNo. 1~ Zhong-12 WcnS and TangmianNo.2. 41 stains were clustered into 2 groups: defoliating types and nondefoliating types.

采用8个棉花黄萎病菌代表菌系和33个北方菌系，在温室条件下，选用鄂荆1号、中-12、文5和唐棉2号4个不同的棉花品种进行致病性测定，其结果根据病株落叶与否可将供试菌系分为落叶型与非落叶型两类。

Bidentis were studied by adopting indoor bioassay. The results showed that the volatile matter of F. bidentis had not allelopathy to four receptor plants. The eluviated matter inhibited seedling growth of cotton obviously, the inhibition ratio of root and stem were 6.29% and 10.42% respectively. The aqueous extract of litterfall and root exudates had different inhibition to four receptor plants, The synthesis effectof all treatments was significantly greater than eluviated matter treatment except for B3 of the aqueous extract of root exudates, such as the synthesis effect of all treatments (A1, A2, A3, B1, B2, B3 and eluviation) were 44.74, 29.37, 14.5, 31.54, 16.52, 3.55, 1.48 respectively.

结果显示：黄顶菊自然挥发物对受体植物不表现化感作用；黄顶菊淋溶物对棉花幼苗生长表现出明显的抑制作用，对棉花幼苗高度和根长的抑制率分别为6.29%和10.42%；黄顶菊枯落物浸提液和根系分泌物浸提液对4种受体植物均表现出不同程度的抑制作用，除了黄顶菊根系分泌物浸提液 B3处理外，其它处理的综合效应均显著大于淋溶物处理，如黄顶菊枯落物浸提液（ A1、 A2、 A3）、根系分泌物浸提液（ B1、 B2、 B3）以及淋溶物等各处理对受体植物的综合效应分别为44.74、29.37、14.5、31.54、16.52、3.55、1.48。

On this basis, I adopt the two-dimentional dynamic planning principle to optimize the irrigating system of the cotton.

推求了棉花的经济灌溉定额，为棉花灌溉制度的制定提供了科学的依据。

But available P is respect of vulnerable to the effects by artificial fertilization, It reflecting the fertilization level, and can find out the available P content of the farm No 16 is higher than that of other two places through the data, which can indicate the manuring amount of the farm is larger than other two place. these three areas are all cotton growing areas, this is the reason why the cotton yield of the farm is higher than other county.

而速效磷则因为容易受人为因素的影响，能够表现出施肥量，通过数据可以看出十六团的速效磷含量比其他两个地方高出很多，可以表明兵团的施肥量要比地方的大，这三个地区都是产棉区，这也是兵团的棉花产量高于地方棉花产量的原因之一。

The simulation results of the model shows that it is able to express correctly the relationship between the yield and water use of cotton and the BP neural network is a new method suitable to simulate the crop response to water under mulched drip irrigation.

本文依据人工神经网络的基本原理在充分吸收其最新理论研究成果的基础上，以膜下滴灌试验得到的实测棉花产量和各生育阶段水分资料为样本建立了基于BP神经网络的棉花作物水分响应模型。

For some kinds of vegetables and pasturages, the contents of some heavy metals surpass the relevant quality standards, so when some crops were planted on the substrates, the uneatable species should be selected preferably and if some kinds of vegetables and pasturages must be adopted, the output could not be provided to mankind and also not be used in farming, in order to avoid harming peoples'health.5 The expediency evaluation model of pioneer plant on substrates was established and some plants were studied. The results show that the expediency evaluation of pioneer plants were respectively that clover was expedient to substrate 1, juniper, cotton and fescue were expedient to substrate 2 and juniper, annual bluegrass, fescue, cotton and clover were expedient to substrate 3.6 Some indexes to evaluate the capability of the phytoremediation on heavy metals and the comprehension about hyperaccumulator were put forward.

有多种植物的重金属含量超过了相应的国家标准，因此在基质上种植植物时，尽量选择非食用性植物品种，即使种植了蔬菜和牧草等植物，也不应将收获后的产品供人类食用或用于畜牧生产，以免危害人体健康。5建立和研究了复垦基质先锋植物的适宜性评价模型，结果表明，不同基质中适宜的先锋植物分别如下：基质1为苜蓿，基质2为桧柏、棉花和高羊茅，基质3为桧柏、早熟禾、高羊茅、棉花和苜蓿。6探讨了评价重金属元素植物修复能力的指标体系和&超富集植物&的概念。

Oil pollutants not only impact wheat emergence, plant height, panicle length but also the germination rates of corn, soybean and cotton seed which is the impacted mostly. Through field comparative analysis between apple trees near wells and those without pollution, index of leaf senescence of fruit trees, apple leaf chlorophyll content and nutrient composition are impacted slightly by the development of oil.Specific measures for the environmental impact of oil development should be issued systematically from the perspective of the government and the public.

石油类污染物对小麦的出苗率、株高、穗长影响较大；石油类污染物对玉米、大豆和棉花种子的发芽率均有影响，其中影响最大的是棉花种子；通过野外调查选择油井附近的苹果树和对照点没有污染的苹果树进行对比分析，发现石油开发对果树的叶片衰老指数、叶片叶绿素含量和苹果的营养成分等影响较小。

The main characters of new cotton hybrid JiH239 were analysed based on the results of Hebei Cotton Regional Test in 2003~2004. The results showed that JiH239 was high yield, disease-resistance and fiber length and strength were better than CK cultivar, micronaire value was a little high. The Bt toxic protein gene expression levels was higher than bollworm-resistant CK Zhongmiansuo41 in different growing period. The purity of bollworm-resistant was higher than Zhongmiansuo41 in seeding period and no significant variety in bud period and flower-boll period.

笔者以2003~2004年河北省棉花品种区域试验结果为依据，分析了棉花新杂交种冀H239主要性状特征，结果表明，冀H239产量突出，抗病性强，纤维长度、纤维比强度优于对照，马克隆值偏高；苗期、蕾期、花期和铃期棉叶中Bt杀虫蛋白表达量、苗期抗性纯合度均高于抗虫对照品种中棉所41；蕾期和花铃期抗性纯合度与中棉所41差异不显著。

The results suggest that bothmaize and castor-oil plant could be refuge to provide susceptible individuals and toprolong the effectiveness of Bt-cotton, but peanut and sesame may not.

说明除普通棉花外，玉米、蓖麻能作为庇护所，提供Bt易感棉铃虫与抗虫棉上的棉铃虫个体随机交配，稀释抗性基因频率，防止棉铃虫对转Bt抗虫棉的抗性，而芝麻和花生不适于作为Bt易感棉铃虫的庇护所在田间与转基因棉花套种。

Soil enzyme activities were studied in long continnous cropping Cotton field and activated charcoal through cotton continuous cropping point trial.

试验通过棉花连作定点微区试验研究了棉花长期连作和活性炭处理后棉田土壤酶活性的变化。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。