查询词典 yield spread

Artificial selection has yield food crops with higher yield, cows that give more milk, tree that grow faster, and many different types of dogs and cats.

人为淘汰有出产量给更多牛奶的食用农作物与更高的出产量，快速地增长的母牛，树和狗和猫的许多不同的类型。

Compared net N 30.0 kg/hm\+2 of organic fertilizer with net N 75.0 kg/hm\+2 of the compound fertilizer, tobacco leaf yield has not been dropped but yield value can be increased 1?

将结晶有机肥用量降至纯N30.0 kg／hm2 与复合肥纯N75.0 kg／hm2 比，烟叶产量无明显降低而产值可增加1741.7 元／hm2 。

Co-coking of blend coal and waste plastics made tar yield increase and water yield decrease in the overlapped decomposition tempera...

首次提出了协同效应强度的概念及其计算式：βi=(Wm-ΣnWj×100和Wj)/Σnj=1j=1βT=Σ｜αiβi｜，并得出废塑料的添加量为1%时，协同效应强度最大。

The results showed that: planting two crops in a year under the condition of 640 mm annual mean rainfall in the Loess Plateau conduced to the substantial use of solar and water resources in summer fallow, the biomass yield, economical yield and water use efficiency was improved in different degrees, and the material cycle was enhanced.

结果显示：在黄土高原东南部年降雨量达640 mm左右的旱作农田，发展&一年二熟&种植能较好地利用夏闲期的水热资源，不同程度地提高了全年的生物产量、经济产量、水分利用效率，加强了农田物质循环。

Along with increase of infecting area and diseased plant rate year after year, the harm of rice stripe blight reached peak in 2005 and resulted in serious rice yield reduction. Yield of Wuyujing series cultivars was reduced about the 50 percent and there was almost no any output in some farmland.

发病面积逐年上升和发病率逐年提高。2005年更是达到发生危害的高峰，造成水稻严重减产，武育粳产量损失达到50％左右，严重田块几乎绝收。

From the research result mentioned above, it was concluded that the selection of excellent single shoot tissue culture seedlings was an effective approach to guarantee fast growth and high yield of rattan plantation; the application of advance planting technique, such as controlling planting time, seedling number per group and spacing was very important for the purpose of minimizing unfavorable effect of rattan planting on upper trees, increasing cane yield and improving the level of economic gain; the determination of optimal harvest regime by adjusting the first harvest time, the lower limit of stem length for cutting as well as the harvest interval offered technical support to utilize resources reasonably and sufficiently and to enhance the economic benefit dramatically.

综合分析，通过组培快繁技术选择优质组培单芽藤是保证藤林速生丰产的有效途径；根据藤种的生物学特性，选择适宜的林地和上层林分，采取调控种植时间、丛栽株数和株行距等造林措施是减少棕榈藤间种对上层树种不利影响、有效增加原藤产量和提高林地增益水平的关键措施；而通过控制初始采收龄、起采茎长和采收间隔期，确定藤林最佳采收方式是促进资源充分利用、提高藤林的经济效益的有力保障。

2 Effects on yield and quality In relay-planting system, increase the quantity of nitrogen application could increase the yield and quality of spring-sown maize and summer-sown maize.

3.2 不同施氮水平产量和品质差异对套作来说，增施氮肥使全年产量提高、品质改善，这得益于春、夏玉米的协调，但是产量的阈值要高于品质阈值。

4 Mechanisms of the effects on yield and quality With the application of nitrogen, the chlorophyll content, NRase activity, photosynthesis rate, fluorescence parameters in the ear leaves of spring-sown maize and summer-sown maize were affected dramatically, which could affect the yield and quality of maize.

3.4 不同施氮水平产量和品质差异的生理学基础春夏玉米套作时，施氮处理显著影响春、夏玉米穗位叶叶绿素含量、硝酸还原酶活性、光合速率、荧光参数等，从而影响产量和品质。

The result showed that the yields of spring wheat and naked oats were negatively related to the monthly average temperature and the sum of them; the yield was positively related to the monthly precipitation and their sum.; and the yield didn't have distinct relation to the monthly sunshine hours.

结果表明，武川小麦和莜麦的丰歉与生长季各月的平均气温及其总和呈负相关，与生长季各月降水量及生长季降水之和呈正相关，与日照时数关系不显著。

Research on Using Rice Hull to Extract Arabinoxylan s;2. Study on the Inheritance and Variation of Arabinoxylan s in Hard Wheat;3. In order to enhance the extraction yield of arabinoxylan from wheat bran,the effect of temperature,time,the concentrations of sodium hydroxide and hydrogen peroxide and shaking speed on yield of arabinoxylan were investigated.

为提高小麦麸皮中阿拉伯木聚糖的得率，本研究在考察了温度、时间、碱液与H2O2浓度和振荡速度等单因素对阿拉伯木聚糖得率影响的基础上，采用二次回归正交旋转组合设计对阿拉伯木聚糖的碱提工艺条件进行了优化并建立数学模型。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。