查询词典 gross yield

The effect of harvesting height on the grass yield and quality of two varieties of Lolium multiflorum was studied and the result showed that the different harvesting height greatly affected the fresh yield, dry mater yield, quality and growth characteristics.

多花黑麦草Lolium multifolium具有很强的再生性和耐刈性，为了确定最佳的刈割利用方式，在有限的耕地中获得较高的产量和效益，采用小区试验的方法，研究了不同刈割高度对多花黑麦草特高和杰威产草量和品质的影响。

Meteorologic data and rice yield data were analyzed in Xinyang from 1991 to 2004, and the reason of yield's decreasing was intense change of sunlight and temperature from July to September, and the rice yield was reduced by 28.28% compared with average of recent five years.

通过对信阳地区1991—2004年的气象数据和水稻产量数据的分析，发现2003年水稻的减产是由于7—9月光温条件的剧烈变化所造成，产量相比近五年平均（2000—2004年）降低了28.28%。

Bis-imidazoline was prepared from triethylene tetraamine and N,N-dimethylformamide dimethyl acetal at 85℃ for 2 h with toluene as solvent, with a yield of 90.4%. The reaction of bis-imidazoline with 1,2-dibromoethane and potassium carbonate in acetonitrile provided with a monobromide salt yield of 78.7%. Hydrolysis of monobromide salt under aqueous causic solution formed 1,4,7,10-tetraazzcyclododecane in a 74.2% yield.

用甲苯作溶剂，使三乙烯四胺和N，N-二甲基甲酰胺二甲基缩醛在85℃反应2 h，得到中间体双咪唑啉，产率90.4%，在乙腈溶剂中，碳酸钾存在下，双咪唑啉和1，2-二溴乙烷进行扩环反应，得到环状中间体一溴盐，产率78.7%，一溴盐经碱性水解2 h，得到1，4，7，10-四氮杂十二烷，产率74.2%。

In order to provide theoretical basis and technological for high-quality and high-yield cultivation of a strong gluten wheat variety,Jimai 20,the experiment studied effects of the radio of nitrogenous fertilizer and potassic fertilizer on yield and qualitly of Jimai 20 under the field conditions with High-yield cultivation.

为了给强筋小麦品种济麦20优质高产配套栽培提供理论依据及技术支撑，在大田高产栽培条件下，研究了氮钾肥施用量及其配比对强筋小麦品种济麦20产量和品质的影响。

The final yield showed that the yield of plastic ridging and furrow drilling increased yield of conventional flat planting 1472.10 kg/hm^2, increased by 19.3%; increased 1844.79 kg/hm^2 compared with ridging and furrow drilling, increased by 25.4%, differences between different treatments were up to super remarkable level.

最终产量测定，起垄覆膜沟播冬小麦极显著的高于传统平作，比传统平作栽培高1472.10 kg/hm^2，增产幅度19.3%；比起垄沟播冬小麦最终产量高1 844.79 kg/hm^2，增产25.4%，差异均达到极显著水平。

The thermal property studies indicate that the mass loss of compound B was 54.39% at 242.2~750℃, and when the temperature was 1000℃, there was 25.11% char residue left, which showed that the title compound has a good thermal stability and char forming capability. Using acetonitrile as the solvent instead of trichloromethane or 1, 2-dichloethane gave higher yield. During the synthesis, the yield was very low when triethylamine was used as acid acceptor alone, and when a little amount of 4-dimethylaminopyridine was added at the same time, the yield could be 81%.

结果表明，所合成的化合物B的结构与预期的结构一致；热性能研究表明，化合物B在242.2~750℃质量损失为54.39%，1000℃时仍有25.11%的炭残渣，显示出优异的热稳定性和成炭性；在相同反应条件下，用乙腈作为溶剂的反应产率比使用氯仿和二氯乙烷为溶剂的高，并且在合成过程中，单独使用三乙胺作为缚酸剂时产率很低，而当同时加入少量4-二甲氨基吡啶时，产率可达81%。

The results indicate that in the synchronizing condition the MRF is unyielded, every point of MRF in the flow field has the same angular velocity. Under the slipping condition, with the increase of magnetic field or the decrease of slip speed, MRF may transfer from whole yield to partial yield. When the MRF wholly yields, the angular velocity of MRF increases nonlinearly with its radius, the non-linear distribution becomes more obvious as the magnetic intensity in the working gap increases. When the MRF partially yields, the yield region expands with the decrease of magnetic intensity or the increase of slip speed and the unyield region always reaches the driven rotor. The transfer torque of MRTD increases with the increase of the external magnetic field, but the transfer torque maintains a constant value approximately with the variation of slip speed at the same magnetic intensity.

研究结果表明，在同步工况下，传动装置流场中磁流变液未屈服，各点角速度相同；在滑差工况下，随外加磁场的增大和滑差转速的减小，磁流变液逐渐从完全屈服向部分屈服转变；磁流变液完全屈服时，磁流变液角速度随半径呈非线性增加，工作间隙中磁场越强，流场的非线性分布越明显；磁流变液部分屈服时屈服区域随外加磁场的增大而减小，随滑差转速的增大而增大，未屈服区与主动转子相连；稳态下磁流变传动装置传递的转矩随外加磁场的增加而近似呈线性增大，但在相同外加磁场下，传递转矩基本不随滑差转速改变而改变，表现出良好的恒转矩特性。

The result shows that the 0503 ripes earlier and suits to be a cultivar of Zizania caduciflora reaped earlier than usual in spring. The 0501 also ripes a little earlier, so the 0503 and the 0501 both suit to be cultivars of Zizania caduciflora reaped earlier than usual in autumn. The 0504, the 0505 and the 0506 all have high yield, in some special situation they can be planted in flowing cold water or planted in high hills to harvest earlier in fall. Thought of the reap time, the yield, the quality of the appearance and the quality of the nutrition, the 0504, the 0505 and the 0506 have high yield and high quality, which can be spread and exported.

结果认为双季茭0503具有早熟特性，适宜作为春早熟栽培品种；单季茭0501也具有较早成熟的特性，和0503均适宜作为露地秋早熟栽培品种，而较为丰产的0504、0505、0506在条件允许时可以进行冷水栽培或高山种植，实现秋早熟；综合熟期、产量、外观品质、营养品质等各方面进行比较，认为0504、0505和0506丰产优质，适宜常规种植推广，并可出口创汇。

This paper based on Precision Agriculture development of China, and focused on several key problems for developing Precision Agriculture, especially field spatial information distribution processing method. The trail farm is located in Shunyi, Beijing. The area is 11 hectors. We sampled the soil, and got soil spatial distribute data , crop growing status distribute data (such as crop population, crop height, plant dry weight), yield distribute data (such as yield per mu, ears per mu, seeds number per ear, weight of thousand grain, plant yield).

本文在探索我国精细农业发展道路的基础上，以当前开展精细农业实践急需解决的关键问题之一—农田空间分布信息处理方法研究作为切入点，通过对北京顺义&三高&农业示范区一块面积约11公顷的农田进行了定点采样试验，得到土壤空间分布信息、苗情分布信息（株数、株高、地上干物重等）、产量分布信息（亩产量、亩穗数、穗粒数、千粒重、生物产量等）。

It showed that this mode was better than "beyond high yield mode" though lower in yield. Farmers evaluated this mode overmatching normal mode except for difficulty in technology and intensity in labor. Sparse 、 manipulative 、 weight middle season rice high yield in the middle of

轻简化栽培模式在沙洋县大田试验产量达到613kg／667m~2，比常规栽培增产4.6％；纯收入达到288.22元／667m~2，比常规栽培多147.98元；农民对该模式的评价是劳动强度小，技术上较容易，有一半的农户认为经济收益好，其它指标优。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。