轮作地

活性炭处理后的轮作地与没有处理过的轮作地单株产量无显著差异，表明活性炭本身对豇豆生长没有影响。

The plant growth and the yield of the rotation cowpea were not seriously different when treated by activated carbon , which showed that the activated carbon itself did not affect the cowpea .

土壤有机质含量由大到小依次为：水稻花生轮作地蔬菜地草莓地水稻田葡萄地；

The gradation of the soil humus content were as followings : rice and peanut rotating land was the maximum , then were vegetable land , strawberry land and rice land , grape land was the minimum ;

在不同的土地利用方式条件下，蔬菜地的土壤水分变化与其他两种用地的差异极为显著，而裸地与小麦&玉米轮作地之间却没有显著差异。

Comparison of change in soil moisture between soils under three different kinds of land uses shows that it is the most remarkable in soil under vegetable , and there is no significant difference between bared soil and soil under wheat or corn .

在洞庭湖腹地选取典型样区，通过调查走访和密集取样，分析了不同土地利用方式（旱地、水旱轮作地、一季稻水田和双季稻水田）下623个农田耕层土样有机碳含量。

By investigation , sampling and laboratory analysis , the SOC contents at four typical land-use types ( including dry-land , flood drought rotation land , single cropping paddy field and double cropping paddy field ) at farmland in Dongting Lake Region were studied .

烟-稻轮作烟地主要是一年生和二年生杂草危害，禾本科、石竹科、蓼科为主要恶性杂草；

In the fields of tobacco-rice crop rotation , malignant herbs are annual or biannial gramineae , polygonaceae , etc.

为进一步筛选出适合湖南省烟稻轮作烟地杂草防除的除草剂，在湖南宁远县对烟稻轮作烟地开展了杂草种类和群落调查，并进行了除草剂防效试验。

An investigation on weed species and communities , and experiments of control effect on several kinds of herbicides in tobacco rice rotation fields were conducted in Ningyuan county of Hunan Province , aiming at screening suitable herbicides for tobacco rice fields .

施氮对稻麦轮作区小麦地上器官干物质及氮素累积运转的影响

Effect of Nitrogen Application on Accumulation and Transportation of Matter and Nitrogen in Above-ground Organs of Wheat in Rice-wheat Rotation Area

水旱轮作能有效地降低地下水位、改善土壤通气条件、增强土壤养分的有效性，有效降低水稻栽培期土壤还原性物质的含量；

Crop rotation with rice and upland crops could lower the groundwater level , improve soil aeration condition , increase soil available nutrients content , and decrease soil reduction matter content during rice planting season .

但在粮草轮作中，绿肥地多收鲜草（饲料）1350～1500公斤/亩；总效益高于粮豆轮作。

But in grain-grass rotation , the field of green manuring has grown grass ( forrage ) to 1350-1500 kg / mu , it gross economic benefit is higher than that of grain-soybean rotation .

烤烟高效栽培及套种免耕玉米关键技术初探用更加多样化的轮作代替秋耕闲地，以及使用最少和/或免耕法技术代替传统的土壤耕种。

A primary discussion on key technologies of fluecured tobacco high-effect cultivation and interplanting in no-tillage maize field The replacement of black fallow by a more diversified crop rotation , and the use of minimum and / or no-tillage technologies in lieu of conventional soil tillage .

明清水旱轮作技术防治害虫得到进一步发展，提出了棉稻等轮作，较大程度地改变了环境，抑制了害虫发生。

The technique to use paddy-upland rotation to prevent pest disasters was further developed , proposed cotton and rice to rotate , this technique changed the environment greater and resisted pest to happen .