抗旱

The ratio of irrigated area to cultivated area,the number of electromechanical wells per each effective irrigational unit,the coefficient o...

结果表明：灌耕比、单位灌溉面积机电井数、土壤有效保水系数、农机动力系数等4个因子可以作为全省农业综合抗旱能力评价的指标；全省农业综合抗旱能力可以划分为高、中、低值区，其中，高值区主要分布在豫中、豫北的大部分地区；中值区比较分散，主要包括中西部低丘、缓岗区，平顶山东部、驻马店及信阳西南部，开封东部-商丘地区，林州-辉县县区；低值区又可分为2个小区，主要包括三门峡、洛阳中西部及南阳地区，信阳中部及东部。

For drought tolerant genotypes, the relative value of proline content, SOD or CAT activity of plumule should be larger than 2.2, 0.8 and 0.8, respectively, while for drought sensitive ones, the relative value should be less than 1.5, 0.65 and 0.4, respectively.

渗透胁迫条件下胚芽鞘脯氨酸、CAT和SOD的T/CK值分别大于2.2、0.8和0.8为强抗旱性品种，而抗旱性弱的品种则分别小于1.5、0.65和0.4。

This indicate most of those kinds are mature from the midst of July to the midst of August,but the aquatic Pteridophyte delay twenty days,especially it is diffirent in Sphenopsids and Xeric spore.

这在研究蕨类生理生态、生长发育、开发抗旱抗寒观叶蕨类，以及筛选抗旱抗寒基因植物等，都有独特的研究价值。

However, the results also showed that these drought-resistant varieties have quite different genetic diversity, which can provide a theoretical basis for using these variety resources in wheat or triticale's draught-resistant breeding.

但反过来可以说明这些抗旱性强的品种其遗传差异较大，遗传变异丰富，为在小麦或小黑麦的抗旱育种中更好地利用这些品种资源提供了依据。

Soil is a notable controlled object as carrier of water and nutrients required by plant growth and development, and reasonable treatments of it are closely related with drought resistance.

干旱条件下培育人工植被，采取适当的抗旱措施是必不可少的，其中作为植物生长发育所需水分、营养的载体，土壤是显著的可调控对象，对其合理处置与抗旱有着密切的关系。

The result showed that the seed which were dealt with EM, Handilong, solution of wood vinegar and distilled water represented various degree difference on the morphological characteristic at the seedling stage and each drought-resistance physiological index.

结果表明，经过EM、旱地龙、木醋液、蒸馏水浸种的：种子在苗期形态特征和各项抗旱生理指标都表现不同程度的差异，EM、旱地龙浸种后植株的抗旱能力的提高要好于蒸馏水、木醋液，并且植株的形态结构趋于优化。

The ability of drought-resistance of the seedlings selected under high-osmosis stress could be valued by synthetically appraisable method.

高渗溶液人工胁迫选出的橡胶籽苗，可以通过抗旱性综合评价方法，对其进行苗期抗旱性评定。

In order to select a kind of eminent grass which is adaptable to the northern China, the present thesis studies ten kinds of grasses from Gramineae, Bromus biebersteinii,Bromus inermis,Festuca arundinacea ,Festuca rubra,Dactylis glomerata ,Phleum pratense,Agropyron desertorum,Agropyron smithii,Elytrigia elongate and Phalaris arundinacea,and also explores the physiological aspects of their drought resistance, cold tolerance and barren resistance. The drought resistance experiment was conducted to study 10 grasses under water stress during seedling stage by simulating indoor drought environment.

为了能选适应我国北方地区的抗旱、耐寒、耐贫瘠特性的优良牧草，本研究以草地雀麦、无芒雀麦、苇状羊茅、紫羊茅、沙生冰草、蓝茎冰草、长穗偃麦草、猫尾草、鸭茅、草芦为材料，在抗旱、耐寒和耐贫瘠性特性三方面的生理方面进行了探索研究。

Through cultivating five cold-season turfgrass (Lolium perenne,Agrostis stolonifera,Festuca rubra,Festuca arundinacea,Bromus inermis) in basin,their drought to lerance indexes,including the planting height,the root growth,the relative water content of leaves,the penetration of membrane,were comprehensively evaluated to compare their drought tolerance.

中文摘要：采用盆栽育苗法，在5种冷季型草坪草苗期连续干旱胁迫下测定植株高度，根系生长，叶片相对含水量和质膜透性等抗旱指标，以综合评价5种冷季型草坪草的抗旱性能。

It was concluded that Glomus mosseae inoculation improved the drought resistance of Broussonetia papyrifera Vent, especially in moderate stressed conditions. And the contribution of AM symbiosis to plant to avoid the stress or to increase its tolerance might be the result of modification of root morphology and fractal character.

由此作者认为，接种G.mosseae在不同土壤水分条件下促进了构树幼苗的生物量积累，这种促进作用在土壤干旱条件下尤为明显，表明AM菌根真菌G.mosseae提高了宿主构树的抗旱性；G.mosseae对宿主构树抗旱性的提高与G.mosseae对构树根系形态特征、分形特征的改变密切相关。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

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。