Reason Analysis and Control Methods of Succession Cropping Obstacle

However, because of slow growth and succession cropping obstacles, the development of American ginseng as medicinal resources is extremely limited.

但由于生长缓慢，连作障碍严重，西洋参药用资源的发展受到极大的限制。

Evaluation on comprehensive benefits of multiple cropping systems on upland red soil

红壤旱地多熟种植系统的综合效益评价

The Cultivation Techniques with High Benefit in Cucumber Seed Production Using Multiple Cropping

黄瓜制种间复种多作高效栽培技术

Evolution and management of soil fertility in rice fields under multiple cropping systems

多熟制条件下稻田土壤肥力演变及其管理

Effect of Multiple Cropping Forage Plant on Production Ability of Cultivated Land

复种牧草对耕地生产效能影响研究

Optimization on High Effect Multiple Cropping Pattern in Irrigated Area of Gansu

甘肃一熟灌区高效农田模式优化筛选

Study on Remote Sensing Methods for Monitoring Multiple Cropping Index

复种指数遥感监测方法研究

Study on productivity and efficiency of six different multiple cropping systems

不同复种方式的生产力和效益研究

A Study on the 25 Year's Successive Triple Cereal Cropping ( Barley Rice Rice) in a Paddy Field

稻田25年定位连种麦-稻-稻三熟制的研究

Change in Crop Yields Soil Nitrogen, Phosphorus, Potassium, and Organic Matter in a Long-term Triple Cereal Cropping System

长期三熟制下谷物产量和土壤氮磷钾及有机质性状的演化

Studies on the Cultural Techniques for A Triple-cropping System Including Hybrid Rice

杂交水稻春制晚杂油菜三熟高产栽培配套技术研究

Field experiment method was adopted in this peper to study the rational fertilizer amount and the compostion applied to the relay croped spring corn in the wheat-corn-rice triple cropping system in the South Jiangsu district.

采用田间试验的方法，对苏南地区麦玉米稻三熟制中套作春玉米的合理施肥量和肥料配比进行了研究。

The Ecological and Economical Adaptability of Wheat-Corn-Rice Triple Cropping System in the Region of Middle and Southern Jiangsu Province

江苏中南部地区麦玉米稻新三熟制的生态与经济适应性分析

Its weather conditions permit triple cropping and its output can have significant ramification on global food commodity prices.

那里的气候条件可以一年进行三次收割，同时它的粮食价格对周边国家的影响都起着不小作用。

Balance of soil organic matter in a long-term triple cropping system in paddy fields

多熟制稻田土壤有机质平衡的定位研究

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

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

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。

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。

Study on the effect of long-term fertilization in double rice cropping system of Southern Anhui

皖南双季稻区长期施肥效应研究