查询词典 obstacle

Autotoxic effect, as one of continuous cropping obstacle factors, has not been widely reported in chrysanthemum.

自毒作用作为连作障碍影响的因素之一，至今在菊花上尚未引起应有的注意。

Laboratory and greenhouse experiments were conducted to determine if the autotoxic effect is responsible for continuous cropping obstacle of chrysanthemum " Gaoyataizi" and the autotoxic effects of different parts from continuous cropping chrysanthemum on seed germination and seedling growth, cuttings rhizogenesis and the growth of potted-chrysanthemum "Gaoyataizi".

为此本论文旨在以连作障碍典型品种之一的'高压太子'为材料，采用室内生测及温室盆栽对菊花的自毒作用进行如下研究探讨：自毒作用是否是导致菊花连作障碍的因素之一；菊花不同部位水浸液处理对自身种子萌发、幼苗生长、扦插生根及盆栽菊花生长及其重要生理生化过程的自毒效应。

These findings show that cotton has autotoxicity effect which maybe one of reasons for continuous cropping obstacle of cotton. The economic yield of cotton will be improved by founding rational cultivate system.

结果表明棉花具有较强的自毒作用，可能是棉花连作障碍的重要原因之一，通过建立合理的耕作制度，可提高棉花经济产量。

The autotoxicity is one of the mechanisms and obstacle effects occurred from continuous cropping.

自毒作用是连作障碍的发生机制之一，该作用主要是由有机酸、醛类芳香酸、香豆素、醌类、生物碱和类萜等植物次生代谢产物及其分解产物所引起的。

To investigate the relationship between autotoxicity and continuous cropping obstacle and to find a reasonable crop rotation system for Angelica sinensis (a common traditional Chinese medicinal plant). Aqueous extracts from root, stem and leaf of A. sinensis at vegetative stage were analyzed for autotoxicity and allelopathic effect on Brassica campestris, Triticum aestivum, Avena sativa which are often grown in regions where A.

为探讨当归自毒作用与连作障碍的关系并建立合理的轮作制度，利用4个浓度当归营养期根部及茎叶部水浸液对当归及其种植区常见作物油菜、小麦和燕麦的种子和幼苗进行了生物测定。

Main obstacle reasons in soil of succession planting vegetables in protected cultivation were reviewed from soil maleficent microorganism increment, soil-borne diseases and insect pests to aggravation, soil nutrient imbalance, soil hypo-salinization, soil acidification and plant autotoxicity.

0引言随着我国蔬菜生产的发展，设施蔬菜栽培面积不断扩大，由于设施栽培的特点是采用人工控制，使设施内部形成了一个特殊的生态环境，且多年连作和大量施用化肥，忽视有机肥使用等，使蔬菜生产出现了各种障碍问题，其严重影响了蔬菜生产和农民收益，并成为制约蔬菜生产可持续发展的瓶颈问题。

We hope that the formation of biazulene compound(201), under the coupling reaction of 1、3-position being along with electron-withdrawing group, 2-position being along with hydroxy group, and four 4、8-position being along with static energy obstacle large enough functional group of azulene compound(200), may have the chiral auxiliary effect like that of the BINOL.

希望将两个在1、3-位置上有拉电子基、2-位置上有羟基及在4、8-位置上有立体能障够大的官能基之薁类化合物(200)，进行偶合反应后所形成的双薁类化合物(201)能够像BINOL那样具有掌性辅助剂之效果。

The center cities of Jiangxi develop backwardly, becoming a big obstacle of restricting the economic and social development of the whole province.

是经济区域中经济发达、功能完善、能够渗透和带动周边区域经济发展的行政、社会组织和经济组织的统一体。

Today, two days prior to their League clash with Betis, the Whites attended a physical session with an obstacle course.

今天，与贝蒂斯的联赛对决之前两天，白衣军团参加了以障碍训练为主的体能恢复。

In a blunter series of reports for the Asian Development Bank which notes that average annual growth in the five worst-hit countries is 2.5 percentage points lower than before the crisis economists called for improved governance and criticised corruption in Indonesia and the Philippines as "a deeply embedded obstacle to progress".

在为亚洲开发银行撰写的一系列更为直白的报告中，经济学家们呼吁改善治理状况，并将印尼和菲律宾的腐败现象斥为&阻碍进步的深层障碍&。*这份报告指出，在5个受金融危机打击最为严重的国家，平均年度增长率较危机前下降了2.5个百分点。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。