查询词典 yield gap

However, the use of Aegliops tauschii in improvement of wheat yield trait has not been reported. In this study, T.durum-Ae.Squarrosa amphidiploids was crossed with common wheat PH85-16, then backcrossed with PH85-16. The variation characteristic of the main yield traits of BC1F1 and BC1F2 were analyzed. Then, QTLs affecting yield traits were detected by 130 SSR primer pairs of D genome in BC_1F_1 and BC_1F_2.The result showed chromosomes in D genome from Aegliops tauschii affected yield trait of wheat significantly.

本研究以二倍体小麦粗山羊草与四倍体硬粒小麦合成的双二倍体Am6为亲本，与普通小麦PH85-16 进行杂交，再用PH85-16 进行回交，对获得的回交后代进行了主要产量性状调查，利用位于小麦D 基组的SSR 分子标记进行了分子标记分析，对来自粗山羊草与产量性状相关的数量性状位点进行定位，探讨粗山羊草对小麦产量性状的影响。

The result of above three aspects indicates:(1) under these optimize conditions,the yield of nitrating reaction is 95.52%, the yield of phase transfer catalysis fluorination is 90.03%, the yield of chlorination is 87.5%,and the reaction total yield is 75.47%, which are higher than the yields reported, the purity of product is 98.5%.

上述研究结果表明：(1)在实验所得的工艺条件下，硝化收率为95.52%，相转移催化收率为90.3%，氯化收率为87.5%，反应总收率达到75.47%，产品纯度为98.5%，均高于文献所报导收率。

Furthermore, the effects of different metallic salts,nitrogen sources,carbon sources,temperature,pH,water content and fermentation time on the enzyme activity and the yield of the acid protease were studied and the results were as follows: both MnCl2 and CuSO4 could activate the protease while other metallic salts inhibited the protease on different levels; addition of 1 % bean flour and 1 % glucose could increase enzyme yield and enzyme activity by 71 % and 31 % respectively; the maximal yield of enzyme was achieved under the conditions of temperature at 40 ℃ and pH as 7.0; water content and fermentation time would also influence enzyme yield on different levels.

不同金属盐对该酶酶活及不同氮源、碳源、温度、pH、含水量以及发酵时间对菌株产酶的影响试验结果表明：MnCl2，CuSO4均对该酶有激活作用，其他金属盐类对该酶有不同程度的抑制作用；添加黄豆粉（1 %）和葡萄糖（1 %）可使菌株产酶酶活分别提高71 %和31 %；培养温度为40 ℃以及培养基起始pH为7.0时产酶最高；含水量和发酵时间对产酶也有不同程度的影响。

The correlation coefficients of 12 of the 35 meteorological factors with wheat yield were significant at the 0.05 level. The precipitation during filling stage and winter wheat yield was significantly corelated, and the direct path coefficient was the highest, and it contributed the most to wheat yield, followed by the precipitation of elongating stage and turning green period. The evapotranspiration in April and May negatively correlated significantly with winter wheat yield at the 0.05 and 0.01 levels, respectively.

在与小麦产量相关的35个气象因子中，有12个因子的相关系数达到了显着或极显着水平，其中灌浆期降水与冬小麦产量呈极显着相关，且直接通径系数最高，对小麦产量贡献率最大；其次是拔节期降水量和返青期降水量；4、5月份的蒸发量与冬小麦产量密切相关，分别接近显着和达到极显着水平，它们对小麦产量形成起较大的负向作用；小麦越冬期间的气温也是不可忽视的气象因素。

Hm~-2, the four cultivation facts all had extremely significant effect on lint cotton yield; boll numbers per ha changed from 692400 to 1073250; single boll weight changed from 4.38 to 5.71 g and the lint percent changed from 41.0 to 42.8%. Different treatments had extremely different effect on yield component factors;(2) According to mathematical model established by lint cotton yield, in 95% confidence interval, when lint cotton yield is more or equal to 2100Kg.

结果表明：(1)皮棉产量变幅为1609.5-2337.0Kg·hm~(-2)，说明不同处理对皮棉产量有极显著的影响；铃数变幅为692400-1073250个·hm~(-2)，单铃重变幅为4.38-5.71克，衣分变幅为41.0-42.8％，表明不同处理对产量构成因素也有极大影响，但与对产量的作用不同步。

In the first stage, when environment temperature arrived to 37.5℃, Ta of A and B dairy barn was 35.5 and 36.7℃, respectively. And at the same time Tr was higher than 39.5℃. Specially, the high yield dairy in A barn raised to 41 ℃ at 22:00 and RR was 90/min, the RR of low yield dairy was 65/min at this time. mTs was 37.6℃ at 15:00. In the third stage, Ta of the barn was higher than outside when outside Ta was lower than 27.6℃. When the ambient temperature was lower than 28℃, the Tr of low yield dairy was between 38.5 and 39℃; if the Ta was down to 24℃, Tr of high yield dairy was lower than 39℃.

第一阶段，舍外Ta平均达37.5℃时，A、B舍内Ta分别为35.5和36.7℃，此时Tr达到39.5℃以上，尤以A舍内高产奶牛22：00最高，平均达41℃；第一阶段平均RR在65次/min以上，高产奶牛在22：00、低产奶牛在15：00最高，分别为94和95.9次/min；平均mTs高产奶牛在15：00高达37.6℃；第三阶段，舍外平均Ta在15：00最高为27.6℃时，此阶段舍内Ta均高于舍外。

Changing formula forms of single-shear, twin-shear and three-shear yield strength criteria, show that many of yield strength criteria of rock and soil materials can be expressed by the τ8 = gf function forms unter the ordinary condition, and that the main differ ences of yield strength value will mainly forcus on the different function forms of gθσ among single-shear, twin-shear and three-shear yield strength criteria.

对岩土体常用的单剪屈服强度准则、双剪屈服强度准则和三剪屈服强度准则进行了系统的论述，通过对单剪、双剪和三剪屈服强度准则进行转化，指出岩土的屈服强度准则一般可表达为τ8=gf的函数形式，阐明了单剪、双剪和三剪屈服强度准则的差异主要表现在g函数的不同，并进一步解释了中间主应力σ2对岩土类材料屈服强度的影响。

This course is an attempt to give the students the basic idea and method of forest management in order to prepare the management plan; Place of forest management in forestry; Content of forest management; Guide principles of forest management; Sustained working; Silvicultural system; Forest yield; Increment; Volume increment; Quality increment; Price increment; Total price increment; Forest maturity; Indicating percent; Productive stage; Physical rotation; Technical rotation; Rotation of maximum volume yield; Highest forest rent rotation; Financial rotation; Cutting cycle of selection system; Normal forest; Normal distribution of age classes; Normal arrangement of stands; Normal increment; Normal growing stock; Normal yield; Improvement of actual forest; Reserve forest; Reserve fund; Planning and plan of forest management; Forest regulation; Area allotment; Volume allotting method; Volume frame work; Area-volume combined frame work; Growing stock; Utilization percent method; Difference method; Pure age-class; Growth method; Control method; Forest subdivision; Forest surveying; Forest survey; Certainty of future policy of forest; Selection of species; Decision of silvicultural system; Decision of rotation; Regulation of future yield; Preparation of management plan; Working the plan; Control and revision of management

本课程之目的为使学生了解森林经营之基本观念及方法，以期编订经营计划，课程包括森林经营学在林学上之地位、森林经营学之内容、森林经营之指导原则、保续作业、森林作业法、森林收获、生长、材积生长、形质生长、腾贵生长、总价格生长、林木成熟期、指率、生产期、自然轮伐期、工艺轮伐期、材积收获最多轮伐期、森林纯益最大之轮伐期、财政轮伐期、择伐林之回归期、法正林、法正龄级分配、法正林分排列、法正生长、法正蓄积、法正伐采额、现时林之改良、预备林、预备金、森林经营上之规划及计划、收获预定、面积配分法、材积配分法、材积平分法、折衷平分法、蓄积法、利用率法、较差法、纯粹龄级法、生长量法、稽核法、森林区划、森林测量、森林调查、将来森林经营方针之确定、树种之选定、作业法之决定、轮伐期之判定、将来收获之预定、经营管理计划之编订、计划之执行、经营管理计划之稽核与检订。

The second section analyzes the restraint conditions of establishing zero-coupon bond yield curve in China. In order to analyze the constraint conditions of establishing zero-coupon bond yield curve, we should firstly study the current situation and problems of Chinese bond market because the data estimating zero-coupon bond yield curve mainly come from bond market which can't be separated from the analysis of the development history of bond market. So the main content of this section includes the development history of bond market, the present problems of Chinese bond market and the restraint conditions of establishing zero-coupon bond yield curve in China.

第二节分析中国零息票债券收益率曲线构造的约束条件，由于估计零息票债券收益率曲线所需要的数据主要来自债券市场，这样，要研究零息票债券收益率曲线构造的约束条件，首先必须研究中国债券市场的现状和问题，而这一切又离不开对中国债券市场发展历史的分析，因此本节的内容包括中国债券市场发展的历史沿革、中国债券市场目前存在的主要问题和中国零息票债券收益率曲线构造的约束条件三个部分。

Whale e-Gap Web Shuttle is a nonprogrammable device that switches a memory bank between two computer hosts. The e-Gap Web Shuttle creates an air gap between the Internet and a company back-office systems.

鲸鱼公司的e-Gap网站快车是一种非可编程装置，它在两台计算机主机之间转换内存库。e-Gap网站快车在因特网和公司的后台办公系统之间设立一个空缺。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"