Day-Length

Correlation between day-length and temperature under natural con - ditions in China and effect to growth and development of Wheat

我国地理条件下日长与温度之间的相关性及其对小麦生育的影响

Temperature was the main factor for the fertility transition of Zhou 13S-1 and day-length had not obvious influence on it .

温度是引起周13S-1雄性育性发生转换的主要原因，日长对其雄性育性没有显著影响。

The temperature effect on buckwheat growth and development is greater than that of day-length .

温度对荞麦生长发育的影响远大于光时的影响。

It was suggested that the female fertility is mainly controlled by day-length and the temperature have no distinct effect .

雌性育性主要由日照长度控制，温度没有明显效应。

Lower temperature and shorter day-length could promote rhizome enlargement , but this affect could cooperate with the other factors , for example , nutrition etc. .

温度降低，日照变短能够促进藕莲根状茎的膨大，但其作用受其他因素（如营养等）协同影响。

The grain number per plant and yield were obviously decreased and the100-grain weight at maturity showed the same tendency regulated by short day-length .

短日处理使单株结实粒数下降，百粒重呈下降趋势，产量降低。

The critical day-length estimated for the borer population in Shi Xing County at 25 ℃ is 13 hr . 20 min. and 13 hr .

在25℃条件下，始兴县和广州种群的临界日长分别为13小时20分和13小时18分。

Studies on the photoperiodic responses of rice varieties native to china & ⅱ . length of vegetative growth of rice varieties under short-day conditions and variation of yield components under different day-length

中国水稻品种对光照长度反应特性的研究&Ⅱ品种在短光照下的生育期及在不同长度光照下产量构成因素的变化

Short day-length resulted in the decrease of whole growth stages , plant height at maturity stage , stem diameters and maximum leaf area index ( LAI ) in the tested adzuki bean cultivars .

短日处理使供试红小豆的生育期缩短、株高降低、茎粗和生育期间最大LAI变小，且表现为短日处理强度和处理时间的剂量效应。

This model has described such environmental factor impacts on the growing speed of tomato as temperature , day-length and the density of CO2 , etc. in the greenhouse . The model has good explanation ability and higher precision .

该模型描述了温室内温度、日照长度长及CO2浓度等环境因子对番茄发育速度的影响，模型具有良好的解释能力和较高的精度。

On the basis of the variation in daily day-length cycle , light system and genetic background , CO activated FT expression and then led to flowering occurrence given that CO expression and daylength were well coordinated .

在每日日长循环、光体系及遗传背景的变化基础上，如果CO的表达和日长状况协调，那么CO激活FT表达，随后开花。

The treatment even needs only one or three long days . but for the complete loss of pollen fertility it is necessary that the plants should be kept under long day-length condition from the stage of " differentiation of secondary branch primordia " .

只给予一或三天的长日光周期巳可导致雄性败育，但只有从第二次枝梗原始体分化期起持续地处于日光周期下，才能使花粉彻底败育。

Through the response analysis of short juvenility varieties to 30 d and 60 d long day-length , it was observed tha 7-9 d and 15-18 d short photoperiods were need respectively for the two varieties to flower after long photoperiod .

通过30天和60天的长日照处理可以发现，长日处理结束后，中豆24和巨丰植株需分别接受7-9天和15-18天的短光照，才能开花和进入结实期。

Under natural temperature artificial photoperiod was carried out to research the photoperiod-sensitive critical day-length of female sterility alteration in photoperiod-sensitive female sterile ramie ( PFSR ) . The correlation between the changing of natural photoperiod-temperature and sterility alteration of PFSR was analyzed .

为研究光周期敏感雌性不育苎麻（PFSR）雌性育性转换的光温效应，在自然温度条件下进行了人工光周期处理，并对自然光温变化与PFSR雌性育性变化的相关性进行了分析。

Studies on photoperiodical reaction of PFSR were conducted . The results can be summarized as follows : ( 1 ) The photoperiod-sensitive critical day-length of female sterility is between 13.0 h and 13.5 h in June and July in Jingzhou ( 30 ° 24 ′ N ) .

对其光周期特性研究分析表明：（1）6至7月，PFSR雌性育性转换的临界日长在13.0h/d至13.5h/d之间，败育发生早而彻底；