轮作

There was no significant water and fertilizer effect on yields of small rape and caraway under.

在小油菜-香菜-番茄-黄瓜轮作体系中，常规施肥处理的N/P2O5/K2O达到2.08/1.6/0.7。

The main conclusions can be summed up as follows:(1) There are the different characteristic at the motion and direction of soil water in process of paddy- wheat rotation.

主要研究结论如下：(1)水旱轮作过程中土壤水的运动和方向均表现出不同的特点。

Key words: paddy field; perennial weed; seed bank;tuber;corm

同时阐述了种子和块茎的寿命，以及免耕和水旱轮作对稻田多年生杂草种子库的影响，并提出了控制措施。

They urged "a rapid shift, whenever and wherever conditions permit it, to management systems based on minimal soil disturbance, increased soil cover, and appropriate crop rotation".

他们敦促，"无论何时何地，只要条件许可，应迅速向以最低限度干扰土壤，增加土壤覆被和适当的作物轮作为基础的管理系统转变"。

How to evaluate crop rotation level in large geographic area is one of the most important problems in agricultural production.

评估大地理区域内作物轮作水平是农业生产中必须解决的重要问题之一。

Objective:To study the characteristics of soil microbial variation during Salvia miltiorrhiza crop rotation.

中文摘要：目的：研究丹参轮作期间土壤各类微生物数量和细菌生理群落结构的变化特点。

In general, crop rotation is able to make soil moisture be recovered within certain range.

可见，轮作可以使土壤水分在一定范围内得到恢复。

As a way of land reserve,it include fallow by year,by season and crop rotation.

土地休耕是土地储备的一种方式，包括年度休耕，季节性休耕、轮作休耕等。

Crop rotation makes a balanced demand on the fertility of the soil.

轮作可以平衡对土壤的肥力要求。

Effect of P application on crop yields in rice-wheat rotation .

表5：水稻小麦轮作中施磷对作物产量的影响

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。