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from the time
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  从时
     According to the data of two satellite time scales (GPS TIME SCALE and GLONASS TIME SCALE)published by the time bulletine of the BIPM Time Section during 1991~1995, we carried out analysis and comparison for their long term characteristics from the time domain to the frsquency domain in this paper.
     根据1991~1995年国际计量局(BIPM)时间部时间公报公布的两种卫星时间标准(GPSTIMESCALE和GLONASSTIMESCALE)的数据[1],我们从时域到频域进行了分析比较。
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     the energy of special frequency range of cutting force signal; and the peak value and the standard deviation from the time and frequency domain. The relationships between the signal features and tool were discussed, then the vectors of the signal features were inputted to neural network for fusion in order to realize intelligent identification of tool wear.
     采用切削力信号监测钻削过程钻头的磨损量 ,分别从时域、频域提取了切削力信号的均值、方差、峭度系数和特定频段能量作为刀具磨损的特征信号 ,讨论了特征信号随着刀具磨损量增加的变化规律 ,并将各个特征信号构成的特征矢量输入多层反传神经网络进行融合 ,实现钻削过程刀具磨损量的智能识别。
短句来源
     The Wigner higherorder moment spectra (WHOS), which are the extensions of the Wigner-Ville distribution (WVD) to higher-order moment spectra domains, can describe the higher-order moment spectral characteristics from the time domain and the frequency domain simultaneously. WHOS is a powerful tool for time-varying non-gauss analysis.
     Wigner高阶谱是Wigner-ville分布到高阶矩谱域的扩展,可同时从时域和频域描述信号的高阶谱特征,是分析时变的非高斯信号的有力工具。
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     The creation of the design is accomplished in the frequency domain filtering, rather than the conventional thoughts from the time domain and devices characteristics.
     其创新点在于从频域角度通过滤波来设计高重复频率的亚纳秒窄脉冲,而不是传统的从时域和器件角度来设计超宽带窄脉冲信号。
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     A discontinuity of the microstrip line can be regarded as a two port lossy network,its S parameters are computed from the time domain simulations and loss rate is given to characterize its radiation loss.
     把微带不连续结构看作二端口有耗网络 ,从时域模拟中提取网络的 S参数 ,并给出损耗率以刻画网络的辐射损耗。
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  “from the time”译为未确定词的双语例句
     Results: From the time of the first operation, the 3-and 5-year survival rates were 60.47% and 41.89%, respectively.
     结果:自首次手术时计算,3年生存率为60.47%,5年生存率为41.89%。
短句来源
     Results 1-,2-,3-,4-,5-year survival rate was 45.3%,42.1%,19.2%,2.3%,1.3% respectively. The longest survival period was 8 years and 3 months from the time of TAE.
     结果 总体 1、2、3、4、5a生存率分别是 4 5 4 %、4 2 1%、19 2 %、2 3 %、1 3 % ,最长 1例存活 8a 3个月 ;
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     RESULTS Compared with those of the control group,the numbers of surviving neurons in the CA1 and CA3 were markedly decreased from the time point of 4 hours after SE for epilepsy group(P<(0.01)) and 6 hours after SE for curcumin treated group(P<(0.01));
     结果:与对照组相比,SE组CA1及CA3区存活神经元数量于SE后2h无明显变化,4h明显减少(P<0.01),24h和72h后神经元数量减少最为明显;
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     The time of initial surgery from the time of injury was between 3to 36months,among which 4patients were tr eated between 3to 6months,29between 6to 12months,2between 12to24months and 1between 24to 36months; 9.4months on the average.
     受伤距第一次神经移位手术的时间为3~36个月,其中3~6个月4例,6~12个月29例,12~24个月2例,24~36个月1例,平均间隔时间9.4个月。
短句来源
     The errorsof the MSBS are analysed with theoretical method and the result showedthat the errors from the time]temperature drift of the sensor and thesample resistance are 0.2%,0.15△T%,0.39△T% respectively.
     对天平系统的测量误差作了分析,结果表明传感器时漂产生0.2%的误差,温漂产生0.15△T%的误差,电流取样电阻的温漂产生0.39△T%的误差。
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  from the time
The values of ρ, obtained from D(t?), and from the time of relaxation of longitudinal nuclear magnetization, differ from each other by an order of magnitude.
      
The method of an ion tag, for example [1, 2], consists in the fact that the gas is ionized (tagged) using a narrow pulsed beam of electrons, and the velocity of the gas is determined from the time of flight of the tag from a known base.
      
A number of exact solutions to this problem are constructed that describe the operation of the reactor from the time of ignition until the onset of the stationary regime of operation.
      
The essence of the method consists in terminating the process at an optimal instant determined from the time dependence of the electric current by using a computer program.
      
The calorimetric system is also virtually free from the time lag typical of the majority of dynamic calorimeters.
      
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This paper reports on biological investigations on two Scelionid egg-parasites,Telenomus dendrolimusi Chu and Telenomus sp., of the pine caterpillar (Dendroli-mus punctatus), and their parasitization under field conditions at Nanking, Kiangsuand Changshan, Chekiang during 1954 to 1955. The effect of cold storage on theeggs both of pine caterpillar and the parasites is discussed. Telenomus dendrolimusi is the well-known egg parasite of pine caterpillar inChina. Formerly there was no knowledge that Telenomus sp....

This paper reports on biological investigations on two Scelionid egg-parasites,Telenomus dendrolimusi Chu and Telenomus sp., of the pine caterpillar (Dendroli-mus punctatus), and their parasitization under field conditions at Nanking, Kiangsuand Changshan, Chekiang during 1954 to 1955. The effect of cold storage on theeggs both of pine caterpillar and the parasites is discussed. Telenomus dendrolimusi is the well-known egg parasite of pine caterpillar inChina. Formerly there was no knowledge that Telenomus sp. parasitizes the cater-pillar egg in China, and this is the first report of its parasitization. Differences bothin the morphological characters and physiological reactions of the adult and larvaof Telenomus dendrolimusi and Telenomus sp. show that they are two different spe-cles. According to data at hand, Telenomus sp. is distributed in Nanking, Kianin,(Kiangsu Province), Changshan(Chekiang Province) and Canton(Kwangtung Pro-vince). It forms about 80% of the two Scelionids found in Nanking. Telenomus sp. overwinters in the larval stage in the egg-shall of its host, Ly-mantria sp. (Lepidoptera, Lymantriidae) and the adult emerges from the time whenthe first-brood Dendrolimus eggs appear the following spring. It does not perish either from low temperature in winter or from shortage of food or hosts in spring.So it is saperior to Telenomus dendrolimusi from the standpoints of biological con-trol practice. In Nanking, Telenomus dendrolimusi has 10-12 generations and Telenomus sp.has 8-9 generatiom annually. The proportion of females is about 80%. A female ofTelenomus sp. parasitizes 30 host-eggs in average, this amount being twice as manyas parasitized by Telenomus dendrolimusi. It oviposites all its eggs within a shortperiod and is easy to rear on a large scale under laboratory conditions. One-dny-old pine caterpillar egg was stored in a refrigerator at 4℃ for onemonth, the development of the embryo was not effected. The mature larvae ofTelenomus sp. are best suited for cold storage. Adults emerging from these eggsafter treatment produce normal healthly progeny without showing any ill effects.

1.本文主要研究松毛虫卵的两种黑卵蜂(Telenomus dendrolimusi Chu及Teleno-mus sp.,Scelionidae,Hymenoptera)的生物学特性;及1954—55年江苏南京和浙江常山等地林间的寄生情况,同时对松毛虫卵及黑卵蜂的冷藏也进行了试验。 2.两种黑卵蜂中,松毛虫黑卵蜂(Telenomus dendrolimusi Chu)与毒蛾黑卵蜂(Telenomus sp.)不但在形态上有所不同。而且在生活习性及各期虫态对低温的反应上亦各异,证明它们确系不同的两种。毒蛾黑卵蜂在我国系首次记载寄生于松毛虫卵中,现知在江苏南京、江宁,浙江常山及广东广州均有分布,在南京的黑卵蜂中占80%以上。 3.毒蛾黑卵蜂以幼虫态在寄主卵内越冬,利于冬季生存。越冬代成虫羽化时间接近松毛虫第1代卵出现期。且有松毒蛾(Lymantria sp.,Lymantriidae,Lepidoptera)作为补充寄主。这些特性均较松毛虫黑卵蜂为优。 4.室内外饲育结果,知松毛虫黑卵蜂在南京年可发生10—12代,毒蛾黑卵蜂年有8—9代,性比雌蜂占80%左右,毒蛾黑卵蜂破坏寄主卵粒平均为30粒左右比松毛虫黑卵蜂平...

1.本文主要研究松毛虫卵的两种黑卵蜂(Telenomus dendrolimusi Chu及Teleno-mus sp.,Scelionidae,Hymenoptera)的生物学特性;及1954—55年江苏南京和浙江常山等地林间的寄生情况,同时对松毛虫卵及黑卵蜂的冷藏也进行了试验。 2.两种黑卵蜂中,松毛虫黑卵蜂(Telenomus dendrolimusi Chu)与毒蛾黑卵蜂(Telenomus sp.)不但在形态上有所不同。而且在生活习性及各期虫态对低温的反应上亦各异,证明它们确系不同的两种。毒蛾黑卵蜂在我国系首次记载寄生于松毛虫卵中,现知在江苏南京、江宁,浙江常山及广东广州均有分布,在南京的黑卵蜂中占80%以上。 3.毒蛾黑卵蜂以幼虫态在寄主卵内越冬,利于冬季生存。越冬代成虫羽化时间接近松毛虫第1代卵出现期。且有松毒蛾(Lymantria sp.,Lymantriidae,Lepidoptera)作为补充寄主。这些特性均较松毛虫黑卵蜂为优。 4.室内外饲育结果,知松毛虫黑卵蜂在南京年可发生10—12代,毒蛾黑卵蜂年有8—9代,性比雌蜂占80%左右,毒蛾黑卵蜂破坏寄主卵粒平均为30粒左右比松毛虫黑卵蜂平均15粒左右为高。产卵期较集中,且在室内容易繁殖。 5.从发育1天的松毛虫卵冷藏于4℃冰箱中1个月不影响毒蛾黑卵蜂的寄生发育。毒蛾黑卵蜂在4℃冰箱中冷藏,以老熟幼虫为最好,冷藏1个月后,对其产生后代数无影

Experiments were carried out with more than 70 varieties and 30 cross combinationS over three years to Study the de elopment of Some characters in the tomato plant in shenyang area.The following primary conclnsions have Leen drawn: 1.Under the condition that seedlings are raised in hot bed and trans planted to the open in early May, the growth period from the time of sowing to first harvest requires about 135 days; and it can be subdivided into the following stages,namely,the gevmination stage (12.5±6.5...

Experiments were carried out with more than 70 varieties and 30 cross combinationS over three years to Study the de elopment of Some characters in the tomato plant in shenyang area.The following primary conclnsions have Leen drawn: 1.Under the condition that seedlings are raised in hot bed and trans planted to the open in early May, the growth period from the time of sowing to first harvest requires about 135 days; and it can be subdivided into the following stages,namely,the gevmination stage (12.5±6.5 days), the seedling stage (29.5±5.5 days), the flower development stage (35±8 days), and the fruit development Stage including the flowering stage (58±10 days),Flower bud differentiation usually begins during the appearance of the fourth leaf.Within the growing season, the shortest growth period occurred white seed were sown in June, and under such condition the time required from seedling emergence to first harvest needs only 80 days. 2.Temperature is the main factor which influences the length of the second developmental stage, which is shorter with mean temperature above 20℃ than it is around 15℃.The main factor that influences the length of the third developmental stage is the intensity of light.The effect of other factors such as the daily mean temperature, deposition of rainfall and others within the range of seasonal variation seems to have only minor importance.With the fourth and fifth developmental stage, temperature is still the main influencing factor. 3.Earliness of maturity has been found to be dependent both upon the time of flowering and the length of fruit development period.Under ordinary cultural condition it depends more upon the length of fruit development period, while under condition unfavorable for flower bud differentiation it depends more upon the flowering time. 4.The position of the first inflorescence varies with the growth condition of seedlings, and its year-round curve (including greenhouse culture) appears to have two peaks, i.e.higher in Spring and Autumn sowing, lower in Summer and Winter Soving.This is also true with hybrid seedlings.It seems that under ordinary condition light intensity and the daily amplitude of temperature are the two main factors which affect the position of the first inflorescence. 5.No Significant correlation was found letween earliness and the position of first inflorescence.The Conventional hypothesis which postulates,the existence of this correlation calls for further consideration. 6.There is no significant correlation existing between the length of fruit development period and the size of fruit finally attained.The length of fruit development period seems to be determined mainly by the rate of development in early stage with mean temperature alove 20℃ which is found to be more rapid than that of 15℃.Fruits that have reached the size alout half of their final diameter require about 25 days for further develop ment to reach maturity under all experimental conditions.Tomato fruits reuire alout 800℃ of summation of mean daily ternperature to develop from fertilization to maturity.However, early varieties may be satisfied with temperature summation lower than this, while late varieties may require a little higher than this. 7.Continuous selection of the early ripening fruits from early maturing plants results in gradually tropping of the mean fruit weight. 8.when plants were prunned to set only with three trusses of fruits, the varietal difference expressed as average yield to the plant was found to have no significant correlation with the mean numler of fruits to the plant tut to depend mainly upon the mean frnit weight of the variety. 9.The distribution of yield within the harvesting period from June to August may roughly be expressed by a curve with only one peak.if the yield is counted by every ten days, then most varieties reach their highest yield at the third or fourth time of picking.Generally, the first three pickings have already yielded about 70—90% of their total products.Inorder to utilize the land more economically a harvesting period lasting 30—40 (lays should be considered as suitable. 10.Most F_1 hybrids are superior to the parents as regard to the earliness of maturity, proluctivity, and high yield on the early stage.Among the varieties which have been tested,"Bison","Bounty" and"podaleaskovsky" are better parents for prolucing early and productive F_1 hybrids.

本文是从1954年起到1957年三年多时间内在沈阳对总共七十多种和三十多杂交组合的番茄的一些性状的观察研究总结,初步结论有以下几点: 一、在沈阳地区春冬温床育苗的情况下番茄从播种到初次收获约需135天,其中发芽期为12.5±6.5天,幼苗期29.5±5.5天,花器发育期为35±8天,果实发育期包括开花期在内为58±10天。花芽分化开始于第四真叶出现时。在一年之中6月播种的物候期最短,从出土到初次收获仅80天。二、影响第二发育分期长短的主要因素是气温,凡是平均温度在20℃以上的都比在15℃左右的短。影响第三发育分期长短的主要因素是光照强度。在自然气候变异幅度内的温度降水量等因素虽有影响但不及光照,影响第四和第五发育分期长短的主要因素也是温度。三、花期早晚和果实发育期的长短对早熟性有大致相等的重要性。在通常温床育苗情况下受果实发育长短的影响较大,当幼苗期条件不利于花芽分化时则受花期早晚的影响较大。四、第一花序节次的高低随育苗环境条件而变。在一年中有二次高低节次变化(包括温室栽培在内),即春秋低冬夏高。杂种也表现相似的趋势。节次的高低似乎主要决定于光照强度和日温差大小。五、第一花序节次的高低和品种成熟期的早晚并无一...

本文是从1954年起到1957年三年多时间内在沈阳对总共七十多种和三十多杂交组合的番茄的一些性状的观察研究总结,初步结论有以下几点: 一、在沈阳地区春冬温床育苗的情况下番茄从播种到初次收获约需135天,其中发芽期为12.5±6.5天,幼苗期29.5±5.5天,花器发育期为35±8天,果实发育期包括开花期在内为58±10天。花芽分化开始于第四真叶出现时。在一年之中6月播种的物候期最短,从出土到初次收获仅80天。二、影响第二发育分期长短的主要因素是气温,凡是平均温度在20℃以上的都比在15℃左右的短。影响第三发育分期长短的主要因素是光照强度。在自然气候变异幅度内的温度降水量等因素虽有影响但不及光照,影响第四和第五发育分期长短的主要因素也是温度。三、花期早晚和果实发育期的长短对早熟性有大致相等的重要性。在通常温床育苗情况下受果实发育长短的影响较大,当幼苗期条件不利于花芽分化时则受花期早晚的影响较大。四、第一花序节次的高低随育苗环境条件而变。在一年中有二次高低节次变化(包括温室栽培在内),即春秋低冬夏高。杂种也表现相似的趋势。节次的高低似乎主要决定于光照强度和日温差大小。五、第一花序节次的高低和品种成熟期的早晚并无一定的相关,所以这方面的传统说法是需要修正的。六、果实发育所需时期的长短与果实最后达到的大小无明显相关。果实发育期的长短主要决定于幼果期的发育速度,而幼果期的长短主要决定于气温,平均温度在20℃以上时显著较在15℃左右时为速。果实发育所需積温约在800℃左右早熟品种较少晚熟品种较多。七、继续选择早熟单株早期果实能使平均单果重逐渐减轻。八、在控制结实花序数的情况下平均单株产量主要决定于平均单果重而与平均单株结果数无明显相关。九、从6月下旬到8月的产果期内分期产量的分布呈单峯曲綫,如以十天为一期则一般品种都在第三第四期连产量的最高峯。一般前三期的产量已达总产量的70~90%,故为有效利用土地起见番茄从开始采果起经30~40天即可拔株。十、杂种第一代在早熟性丰产性和早期产量方面一般都优于亲本品种。从利用杂种第一代获得早熟丰产系统来讲「比」「矮红金」「波逹里斯可夫」等都是较优良的亲本。

Experiments were carried out with more than 70 varieties and 30 cross combinations over three years to study the development of some characters in the tomato plant in Shenyang area.The following primary conclusions have Leen drawn. 1.Under the condition that seedlings are raised in hot bed and trans- planted to the open in early May,the growth period from the time of sowing to first harwest requires about 135 days;and it can be subdivided into the follwing stages,namelyi,the germination stage(12.5±6.5...

Experiments were carried out with more than 70 varieties and 30 cross combinations over three years to study the development of some characters in the tomato plant in Shenyang area.The following primary conclusions have Leen drawn. 1.Under the condition that seedlings are raised in hot bed and trans- planted to the open in early May,the growth period from the time of sowing to first harwest requires about 135 days;and it can be subdivided into the follwing stages,namelyi,the germination stage(12.5±6.5 days),the seedling stage(29.5±5.5 days),the flower development stage(35±8 days),and the fruit development stage including the flowering stage(58±10 days).Flower bub differentiation usually begins during the appearanue of the fourth leaf. Within the growing season,the shortest growth period occurred while seed were sown in June,and under such condition the time required from seedling (?)mer gence to first harvest needs only 80 days. 2.Temperature is the main factor which influences the length of the second developmental stage,which is shorter with mean temperature above 20℃ than it is around 15℃.The main factor that influences the length of the third developmental stage is the intensity of light.The effect of other factors such as the daily mean temperature,deposition of rainfall and others within the range of seasonal variation seems to have only minor importance.With the fourth and fifth developmental stage,temperature is still the main influencing factor. 3.Earliness of maturity has been found to be dependent Loth upon the time of flowering and the length of fruit development period.Under ordinary cultural condition it depends more upon the length of fruit development period, while under condition unfavorable for flower bud differentiation it depends more upon the flowering time. 4.The position of the first inflorescence varies with the growth condition of seedlings,and its year-round curve(including greenhouse culture)appears to have two peaks,i.e.higher in Spring and Autumn Sowing,lower in Summer and Winter Sowing.This is also true with hybrid seedlings.It seems that und- er ordinary condition light intensity and the daily amplitude of temperature are the two main factors which affect the position of the first inflorescence. 5.No significant correlation was found letween earliness and the position of first inflorescence.The Conventional hypothesis which postulates,the existe- nce of this correlation calls for further consideration. 6.There is no significant correlation existing between the length of fruit development period and the size of fruit finally attained.The length of fruit development period seems to be determined mainly by the rate of development in early stage with mean temperature above 20℃ which is found to be more rapid than that of 15℃.Fruits that have reached the size about half of their final diameter require about 25 days for further development to reach maturity under all experimental conditions.Tomato fruits require about 800℃ of summ- ation of mean daily temperature to develop from fertilization to maturity.Ho- wever,early varieties may be satisfied with temperature summation lower than this,while late varieties may require a little higher than this. 7.Continuous selection of the early ripening fruits from early maturing plants results in gradually dropping of the mean fruit weight. 8.when plants were prunned to set only with three trusses of fruits,the varietal difference expressed as average yield to the plant was found to have no significant correlation with the mean number of fruits to the plant out to dep- end mainly upon the mean fruit weight of the variety. 9.The distribution of yield within the harvesting period from June to August may roughly be expressed by a curve with only one peak.If the yield is counted by every ten days,then most varieties reach their highest yield at the third or fourth time of picking.Generally,the first three pickings have already yielded about 70—90% of their total products.lnorder to utilize the land more economically a harvesting period lasting 30—40 days should be considered as suitable. 10.Most F_1 hybrids are superior to the paxents as regard to the earliness of maturity,productivity,and high yield on the early stage.Among the varieties which have been tested,“Bison”,“Bounty”and“podaleaskovsky”axe better parents for protucing early and productive F_1 hybrids.

本文是从1954年起到1957年三年多时间内在渖阳对总共七十多品种和三十多杂交组合的番茄的一些性状的观察研究总结,初步结论有以下几点:一、在渖阳地区春冬温床育苗的情况下番茄从播种到初次收获约需135天,其中发芽期为12.5±6.5天,幼苗期29.5±5.5天,花器发育期为35±8天,果实发育斯包括开花期在内为58±10天。花芽分化开始于第四真叶出现时。在一年之中6月播种的物候期最短,从出土到初次收获仅80天。二、影响第二发育分期长短的主要因素是气温,凡是平均温度在20℃以上的都比在15℃左右的短。影响第三发育分期长短的主要因素是光照强度。在自然气候变异幅度内的温度降水量等因素虽有影响但不及光照,影响第四和第五发育分期长短的主要因素也是温度。三、花期早晚和果实发育期的长短对早熟性有大致相等的重要性。在通常温床育苗情况下受果实发育长短的影响较大,当幼苗期条件不利于花芽分化时则受花期早晚的影响较大。四、第一花序节次的高低随育苗环境条件而变。在一年中有二次高低节次变化(包括温室栽培在内)即春秋低冬夏高。杂种也表现相似的趋势。节次的高低似乎主要决定于光照强度和日温差大小。五、第一花序节次的高低和品种成熟期的早晚并无一定...

本文是从1954年起到1957年三年多时间内在渖阳对总共七十多品种和三十多杂交组合的番茄的一些性状的观察研究总结,初步结论有以下几点:一、在渖阳地区春冬温床育苗的情况下番茄从播种到初次收获约需135天,其中发芽期为12.5±6.5天,幼苗期29.5±5.5天,花器发育期为35±8天,果实发育斯包括开花期在内为58±10天。花芽分化开始于第四真叶出现时。在一年之中6月播种的物候期最短,从出土到初次收获仅80天。二、影响第二发育分期长短的主要因素是气温,凡是平均温度在20℃以上的都比在15℃左右的短。影响第三发育分期长短的主要因素是光照强度。在自然气候变异幅度内的温度降水量等因素虽有影响但不及光照,影响第四和第五发育分期长短的主要因素也是温度。三、花期早晚和果实发育期的长短对早熟性有大致相等的重要性。在通常温床育苗情况下受果实发育长短的影响较大,当幼苗期条件不利于花芽分化时则受花期早晚的影响较大。四、第一花序节次的高低随育苗环境条件而变。在一年中有二次高低节次变化(包括温室栽培在内)即春秋低冬夏高。杂种也表现相似的趋势。节次的高低似乎主要决定于光照强度和日温差大小。五、第一花序节次的高低和品种成熟期的早晚并无一定的相关,所以这方面的传统说法是需要修正的。六、果实发育所需时期的长短与果实最后达到的大小无明显相关。果实发育期的长短主要决定于幼果期的发育速度,而幼果期的长短主要决定于气温,平均温度在20℃以上时显著较在15℃左右时为速。果实发育所需积温约在800℃左右早熟品种较少晚熟品种较多。七、继续选择早熟单株早期果实能使平均单果重逐渐减轻。八、在控制结实花序数的情况下平均单株产量主要决定于平均单果重而与平均单株结果数无明显相关。九、从6月下旬到8月的产果期内分期产量的分布呈单峰曲线,如以十天为一期则一般品种都在第三第四期达产量的最高峰。一般前三期的产量已达总产量的70~90%,故为有效利用土地起见番茄从开始采果起经30~40天即可拔株。十、杂种第一代在早熟性丰产性和早期产量方面一般都优于亲本品种。从利用杂种第一代获得早熟丰产系统来讲「比(?)」「矮红金」「波达里斯可夫」等都是较优良的亲本。

 
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