单作

Make sure you become conversant with the many problems of large-scale energy-and input-intensive monoculture.

确定你要熟悉大规模经营、能源和投入密集的单作的许多问题。

During President Bush's recent visit to Brazil he was treated to slogans against the sugar-cane "monoculture".

在布什总统访问巴西期间，就遭遇了反对甘蔗的标语："单作"。

The contents of Si in leaves, stems and panicle of wheat were significantly decreased with nitrogen application rate increased.

施氮对小麦硅累积量和硅的吸收速率也有显著影响，单作和间作小麦硅累积量和吸收速率随氮肥用量的增加而增加。

NO3-N accumulation in soil of intercropped faba bean and pea were grater than that in sole faba bean and pea, but varied with different nitrogen application and time in intercropped soybean, wheat and maize.

蚕豆和豌豆间作土壤硝态氮累积量都高于单作，而大豆、小麦和玉米间作在不同时间和不同氮水平下表现不一样。

We conducted a greenhouse experiment to test this hypothesis by using invasive Solidago canadensis and native Kummerowia striata as model plant species under lead contamination.

本研究借助於温室试验，通过入侵物种加拿大一枝黄花和本地物种鸡眼草的单作和混植试验，证验了这一假说。

With vertical-section analysis, in the later of experiment, naked terra and wheat land make content of soluble salt high in 0～20cm,and decreasing with deepening of soil-layer; the content value of planting two-year-old Onobrychis viciaefolia 、one-year-old Onobrychis viciaefolia 、interplanting and sequential cropping in the every soil-layer is equal; in harvest, only planting wheat and interplanting display content of soluble salt is high in middle-layer (20～60cm) and low in surface and down layers(0～20cm,60～80cm).

土壤垂直剖面分析，试验末期裸地的土壤盐分表现为0～20cm 土层高，随土层深入含量逐渐降低；二年生红豆草、一年生红豆草、套种和复种处理的土壤盐分均表现出各层含量近似相等的特征；小麦收获期，单作小麦和小麦套种地各土层的可溶性盐含量均表现为中层(20～60cm)高、上下层(0～20cm 和60～80cm)低的特征。

From Apr.1st to Oct. ninth, when two-year-old Onobrychis viciaefolia 、one-year-old Onobrychis viciaefolia 、Triticum 、Triticum aestivum/ Vicia villosa 、Triticum aestivum/ Brassica campertris 、Triticum aestivum-Vicia villosa and Triticum aestivum-Brassica campertris are planted, their content of soluble salt in 0～20cm soil layer are lower than that in uncovered soil, in the period of harvest , they decrease 0.361%、0.331%、0.141%、0.327%、0.312% and 0.317% respectively.

从时间变化分析，采用二年生红豆草、一年生红豆草、单作小麦、小麦/毛苕子、小麦/油菜、小麦-毛苕子和小麦-油菜7 种绿色覆盖模式时均使土壤表层盐分含量比同期裸地的低，生育期末分别降低了0.361%、0.331%、0.141%、0.327%、0.312%、0.321%和0.317%。

160 Cm soil layers by soil drill and Nmin concentrations in the soil were measured by flow analysis after CaCl2 extraction. The results showed that NO3--N is the major inorganic nitrogen form in orthic anthrosol soil, and there are no significant differences in soil Nmin accumulation between sole cropping and faba bean/maize intercropping at the co-growth stage.

在田间条件下于2006—2007年研究了不同氮水平下（N 0、75、150、225、300 kg/hm2）蚕豆/玉米间作体系与其相应单作体系土壤无机氮的时空分布规律，旨在为河西走廊灌区蚕豆/玉米间作体系的氮素管理提供理论依据。

On the basis of observation on the incident and transmitted photosynthetically active radiation of the winter wheat canopy under the monoculture and intercropping ways, the diurnal change of interception photosynthetically active radiation, the relationship between IPAR and leave area index, and the shading of the winter wheat were studied.

文章摘要：通过对单作和间作种植模式下作物冠层入射和透射光合有效辐射的观测，研究了不同种植模式下冠层光合有效辐射截获量的日变化规律及其与叶面积指数的关系以及冬小麦对预留行的遮荫作用。

The results showed that, no matter mono-cropping and relay-planting, the grain SS activity of spring-sown maize and normal summer-sown maize were decreased at the early stage after anthesis, but after 40 DAA the decrease speed were slow and could maintain a high activity for a long time, which were benefit to the sucrose formation, accumulation and transportation.

结果表明，不管单作还是套作条件下增施氮肥前期春玉米和普通夏玉米籽粒SS活性略有降低，但花后40天后其活性降低慢，能长时间维持较高的值，利于蔗糖的合成、积累和转移。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。