轮作

Trials to investigate rice rotations with legumes identified Canavalia ensiformis, Crotalaria juncea, Cajanus cajan and Mucuna spp as the most efficient in suppressing weeds.

试验调查与水稻轮作豆科植物确定白刀豆，芥菜crotalaria分，木豆和Mucuna作为最有效的抑制杂草菌。

Wheat and soybeanyields were higher, contrast and Vicia villosa Roth were lower.

小麦及大豆轮作处理的产量均较高，对照及毛苕子轮作处理产量较低。

In addition, non-tillage is superior to ploughing and subsoiling in retarding the contents of total iron, manganese, copper, and zinc, but in addition to manganese, the availability of iron, copper, and zinc is lower than the empress both.

不施肥情况下，小麦长期连作比轮作和玉米、大豆连作土壤中有机质、全氮、全磷下降幅度大，全量铁、锰、铜和锌则以轮作降幅最大。

Under conventional N fertilization and irrigation condition, N2O emissions during 2001-2002 and 2002-2003 in winter wheat and summer maize rotation system were 1959 g N hm-2 and 1250 g N hm'2, respectively; and 68%-86% of N2O emission occurred in summer maize growth season, the emissions mainly occurred in 2 weeks after N fertilization and irrigation. The highest flux rates were 5.06 mg m-2 d-1 and 5.60 mg m-2 d-1 in the rotation period of 2001-2002 and 2002-2003, which were happened at the ten-extended leaf stage in summer maize season when top-dressing N fertilizer was applied.

在冬小麦／夏玉米轮作体系农民传统的水肥管理处理中，2001-2002和2002-2003两个轮作周期内测得的N_2O的排放量分别为1959 gN hm~(-2)和1250 gN hm~(-2)，N_2O的排放主要集中在每次施肥和灌水之后的两周内，其中夏玉米十展叶期追肥后两周内N_2O的排放速率最高，2002年和2003年分别达到5.06 mg m~(-2)d~(-1)和5.60 mg m~(-2)d~(-1)。

Results indicated that the rotation system of rice-vegetable with mid-late rice and the pattern of summer fallow significantly enhanced the activity of soil invertase and acid phosphatase, between which rice-vegetable pattern was superior to summer fallow.

结果表明，一季中晚稻的稻菜轮作模式和休闲轮作模式明显提高了土壤蔗糖酶和酸性磷酸酶的活性。

The increments of organic matter, total nitrogen and total phosphorus in soil were 3.05~3.06g/kg, 0.06~0.07g/kg and 0.01~0.26g/kg, respectively. Spring wheat-spring highland barley or spring highland barley-winter wheat rotation also was benefited to raise soil fertility.

轮作周期内春稞→春油菜、春小麦→春油菜轮作对以细菌为主导的土壤微生物的生长与繁殖具有显著的促进作用，耕层土壤有机质、全氮、全磷的绝对增长量分别达3.05~3.06g/kg，0.06~0.07g/kg，0.01~0.26g/kg。

"A typical scheme selects rotation crops from three classifications: cultivated row crops (e.g., corn, potatoes), close-growing grain s (e.g., oats, wheat), and sod-forming, or rest, crops (e.g., clover, clover-timothy)."

典型的轮作耕种计画是从行间作物、密植的谷类、草根层作物或休闲作物(如车轴草、车轴草－梯牧草)中选择轮作作物。

"A typical scheme selects rotation crops from three classifications: cultivated row crops (e.g., corn, potato es), close-growing grains (e.g., oats, wheat), and sod-forming, or rest, crops (e.g., clover, clover-timothy)."

典型的轮作耕种计画是从行间作物、密植的谷类、草根层作物或休闲作物(如车轴草、车轴草－梯牧草)中选择轮作作物。

"A typical scheme selects rotation crops from three classification s: cultivated row crops (e.g., corn, potatoes), close-growing grains (e.g., oats, wheat), and sod-forming, or rest, crops (e.g., clover, clover-timothy)."

典型的轮作耕种计画是从行间作物、密植的谷类、草根层作物或休闲作物(如车轴草、车轴草－梯牧草)中选择轮作作物。

"A typical scheme selects rotation crops from three classifications: cultivated row crops (e.g., corn , potatoes), close-growing grains (e.g., oats, wheat), and sod-forming, or rest, crops (e.g., clover, clover-timothy)."

典型的轮作耕种计画是从行间作物、密植的谷类、草根层作物或休闲作物(如车轴草、车轴草－梯牧草)中选择轮作作物。

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。