查询词典 multiple cropping

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。

The results show that Dioscorea opposita+Capsicum frutescens and Perilla frutescens var. Crispa+Forsythia suspensa cropping systems have higher scores under different weight index evaluations, while traditional cropping systems, Zea mays/Ipomoea batatas has the lowest scores.

评价结果表明，在评价指标不同权重比例下，紫苏＋连翘间作模式、山药＋辣椒间作模式生态经济综合效益均较高，玉米／红苕的传统种植模式综合效益最低。

Significant differences were observed in the kinetic parameters of test enzymes between continuous cropping of gramineous crops and continuous cropping of or rotation with leguminous crop.

土壤质量与土壤的生物学性质密切相关，种植制度对土壤生物学特性的影响研究对土壤质量管理具有重要的意义。

During studying different levels potential yield of main cropping modes, bring forward the conception of "equivalence potential yield", and this conception made potential yield of different crops comparable and transpositional. So we can analyze the main factors influencing mostly different levels potential yield of monoculture and main cropping modes for different regions.

在对种植模式生产潜力的研究过程中提出了等价生产潜力的概念，以解决不同作物间生产力的横向比较与换算问题，同时注意到单一作物与种植模式间的生产潜力影响因素，并量化分析了这些主要的影响。

The result showed that the contents of p hydroxy benzoic acid,vanillic acid(extracted by 1mol·L -1 NaOH) in continuous cropping soil were significant higher than that in normal cropping soil,and the content of vanillin had no significant difference in these soils.

结果表明，重茬土壤中对羟基苯甲酸和香草酸的含量(1mol·L-1NaOH提取)大于正茬土壤，且差异达到极显著水平，香草醛含量差异不显著；重茬大豆根系水提液中对羟基苯甲酸、香草酸、阿魏酸、香草醛、香豆素含量均高于正茬。

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。

There was no significant soil and water loss differences in equivalent peanut land between sole peanut and alley cropping systems. There were also 146-172mm surface runoff and 6503-7571kg ha〓 soil losses annually in alley cropping systems.

就可比花生种植面积而言，花生南酸枣间作方式下水土流失量与传统花生种植方式下没有显著差别，年地表径流和土壤流失量仍然分别高达146～172mm和6503-7571kg ha〓。

Twenty quadrats were selected randomly in the cropping fields of Xishan District of Mudanjiang City and its around areas. The hoarding habit of A. agrarius in the cropping fields in suburbs of Mudanjiang City was studied through hole-digging and measurement method.

方法］在牡丹江西山及周边的庄稼地内随机选择20个样方，采用挖洞测量法研究了牡丹江城市郊区庄稼地的黑线姬鼠的贮食习性。

Therefore, several experiments were carried out to study their effect on the growth of tobacco seedlings and the activities of enzymes in soils. The main objects were to realize the mechanisms and reasons of continues cropping obstacles, to provide scientific information for solving the problems produced by continuous cropping, and to improved the yields and qualities of fire-cured tobacco in tobacco-growing areas of Southwest China.

本项研究以烤烟根系分泌物和根残体为材料，探索它们对幼苗生长和土壤酶活性的影响，旨在研究烤烟连作障碍发生的机理和可能的原因，为进一步解决我国西南主要烟区的连作障碍问题，提高烟叶的质量和产量提供科学依据。

Alley cropping; strip cropping: Growing two or more crops in alternating strips or blocks on the same piece of land at the same time.

条植法；条播法：在同一块田里按条或块同时种植两种或两种以上的作物。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。