continuous cropping

Effects of Long-Term Continuous Cropping System of Cotton on Soil Physical-Chemical Properties and Activities of Soil Enzyme in Oasis in Xinjiang

新疆绿洲棉花长期连作对土壤理化性状与土壤酶活性的影响

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Sugarcane is an asexually reproductive plant, and after continuous cropping for several years, the yield and quality generally decline because of various kinds of pathogens' infecting.

甘蔗系无性繁殖作物，容易因多年连续种植后受到各种病原物的反复侵染，造成产量和品质下降。

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3, The effects of continuous cropping years on bacterial physiological groups were in the order: the total microbe number of ammoniation> nitrifier> azotobacter and cytophaga in investigated bacteria;

连作对微生物生理类群的影响，在分析的几类有益细菌生理群中，氨化细菌>硝化细菌>固氮菌和纤维素分解菌；

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Using Agri-technique Methods to Increase Continuous Cropping Soybean Yield

提高重迎茬大豆单产的技术措施

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Influence of Continuous Cropping on Microelements in Tobacco-planting Soil and Tobacco Plant

连作对植烟土壤及烟株中微量元素含量的影响

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Effect of crop rotation continuous cropping and different cultivation methods on fertilizer utilization ratio of nitrogen and phosphorus

轮作、连作及不同耕法对氮、磷肥料利用率的影响

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Formation Mechanism and Control Measures of Continuous Cropping Obstacles in Medicinal Plants

药用植物连作障碍的形成机理及其防治

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The Effects of Continuous Cucumber Cropping on Microbial Communities Structure ⅰ& Based on Quantitative Analysis of Culturable Microbial Population

黄瓜连作对土壤微生物区系的影响Ⅰ&基于可培养微生物种群的数量分析

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Taking Rehmannia glutinosa Libosch, a medicinal plant with typical continuous cropping obstacles as the testing material, using the field experiment combined with lab analysis as the method.

本实验以具有典型连作障碍效应的药用植物地黄（Rehmannia glutinosa libosch.）为试验材料，采用大田实验与室内分析相结合的方法。

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The Technology Research of Using Beneficial Microorganism to Prevent and Control Rehmannia Glutinosa Libosch Pathogenic Continuous Cropping Barrier

地黄病原性连作障碍有益微生物防治技术研究

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There were significant difference in growth characteristics and productivity in continuous cropping years.

不同连作年限土壤对黄瓜生长特性和产量均有极为显著的影响.

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Effect of Continuous Cropping on Yield, Quality of Jerusalem artichoke and Soil Enzymes Activities

连作对菊芋生物量、品质及土壤酶活性的影响

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Bacterial community structure was significantly influenced by continuous cropping system.

同时蔬菜连作对土壤中细菌的群落组成产生影响，这种影响同蔬菜作物种类和连作年限有关。

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Therefore diseases and physiological barrier are the main factors of continuous cropping barrie of watermelon.

因此,生理障碍和病理障碍是构成西瓜连作障碍的主导因素.

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Effects of Long-term Crop rotation and Continuous Cropping on Phosphorus forms in Different Crop Soil

长期轮作连作对不同作物土壤磷组分的影响

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Objective To discuss the internal and external factors'functional mechanism of ginseng continuous cropping obstacle.

目的探讨人参连作障碍的内外在因素作用机制.

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Influence of continuous cropping in plastic shed cover on the yield and quality of Chinese chives and soil nutrients

大棚韭菜连作对产量和品质及土壤养分状况的影响

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Effect of continuous cropping on growth and root diseases of strawberry

连作对草莓生长发育和根部病害发生的影响

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Study on Correlation between Soil Enzymatic Activity and Soil Fertility in Continuous Cropping Cotton Field

连作棉田土壤酶活性特征及其与土壤养分相关性研究

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Several problems as follow on allelopathic are mainly approached so as to supply research methods on barrier mechanism of soybean continuous cropping ( 1) Selecting extraction sources, extracts and collection methods of allelochemicals;

本文着重地探讨了大豆连作障碍中有关化感作用研究应注意的若干问题，具体内容如下：（1）化感物质的提取源、提取剂及其收集方法的选取；

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However, after continuous cropping the Rehmannia glutinosa Libosch will have serious disease, Yield lower and cannot be planted again about 8~ 10 years at the same place.

然而地黄连作后病害严重，药材减产，同一块地在8～10年左右不能重栽。

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Description of long-term continuous cropping decreased the soil enzyme activity.

长期轮作处理下的土壤酶活性均高于连作，说明长期连作降低了土壤酶活性。

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