photoperiod 中文意思是什麼

The cline is considered the probable result of geographic trends in precipitation, temperature, and perhaps also photoperiod.

人們認為這種梯度變異可能是降水量，溫度也許還有光周期等地理趨勢造成的結果。

The effect of environmental conditions in xiamen waters on the diapause emerging in eggs both the temperature and photoperiod { in situ. ) have a obvious effect on the diapause emerging in eggs, respectively

海區環境對卵滯育發生的影響海區溫度和日照時間對卵滯育的發生都分別有明顯的影響。

Florigen ( flowering hormone ) a hypothetical plant hormone that has been postulated to account for the transfer of the photoperiod stimulus from the leaves to the apex where flowering is induced

成花激素：一種假定的植物激素，該假設用來解釋來自於葉中，在莖端誘導成花的光周期刺激物質的轉運。

The effects of short photoperiod on thermogenesis in mongolian gerbil meriones unguiculatus

短光照對長爪沙鼠產熱的影響

The gibberellins interact also with photoperiod in the determination of flowering.

赤霉素也和決定開花的光周期有關。

Effects of photoperiod, salinity, temperature and fe on survival and reproduction of artemia

對鹵蟲生存及繁殖的影響

Cryptocaryon irritans ciliophora : photoperiod and transmission in marine fish and its control

海水小瓜蟲生活史及白點病防治

Effect of hormone on seed culture in short photoperiod low temperature induced male sterile rice

激素對短光低溫不育水稻種子培養的影響

But the photoperiod sensitivity of the tropical and subtropical maize blocked this process

針對熱帶亞熱帶玉米種質這些特點，誘變可以發揮重要的作用。

Experiments were set on sterilized petridishes with a photoperiod of 24 h at room temperature of 27 - 30

實驗在27 - 30的室溫和24小時的光照條件下進行。

Effects of reducing photoperiod and temperature on energy metabolism and body composition in brandt ' s voles lasiopodomys brandtii

漸變的光周期和溫度對布氏田鼠能量代謝和身體成分的影響

Fresh seeds of neolitsea acuminatissima germinated slowly at 30 / 20 in light ( with a 12 - h daily photoperiod ) and required > 20 wk to complete germination

摘要新鮮採收的高山新木姜子種子在變溫30 / 20和每天12時光照下發芽緩慢，需要20周以上的時間才能全部發芽完畢。

Egg in diapause or not : logit ( p ) = - 41. 832 + 1. 422x1 ( sea - water temperature ) + 0. 509x2 ( photoperiod ) ; female laying diapause eggs or not : logit ( p ) = - 89. 001 + 6. 611x ( photoperiod ) the former reflected the effect of environmental conditions on the amount of diapause eggs of this species in xiamen waters, and it is important to study the population dynamics of this species in this area ; while the latter reflected the effect of envi ronmental conditions on inducing the female of this species to lay diapause eggs, and it is important to research the diapause inducers of this species in this area and the physiological mechanism of diapause

卵是否滯育： logit （ p ） = - 41 . 832 + 1 . 422x _ 1 （海水溫度） + 0 . 509x _ 2 （日照時間） ；雌體是否產滯育卵： logit （ p ） = - 89 . 001 + 6 . 611x （日照時間） 。前者反映的是海區環境對整個廈門海區該種類滯育卵多寡的影響，對于研究本海區該種類的種群動力學有著重要意義；後者反映的是海區環境對該種類雌體產滯育卵的誘導作用，對于研究誘導該種類在本海區滯育的環境因子和生理機制具有重要意義。

With the temperature of sea area in situ, and the photoperiod during collecting samples, the two most important factors in inducing diapause, as the independent variable, whether the egg was in diapause ( or whether the female laid diapause eggs ) was regarded as the dependent variable, and the probabilistic equations of egg in diapause and female laying diapause eggs were established

以採集雌體時海區的現場溫度和日照時間這兩個影響滯育發生的最基本因素作為自變量，以卵滯育與否或雌體產滯育卵與否為因變量，建立了瘦尾胸刺水蚤卵滯育（或雌體產滯育卵）的概率預測模型。

In order to select male nucleo - sterile new genotype, a tentative idea was put forward for the nucleo - male sterility to attach a tps ( thermo - photoperiod sensitivity ) and a selection strategy of combination of selection and identification, at the same time, the spring and summer sowing method were used to provide different environment conditions of appraising sterility and tps. the results indicated that ( 1 ) sterility could be appraised under the spring sowing environment and tps could be appraised under summer sowing environment. ( 2 ) under spring sowing environment, sterility could be selected, but not maintained. thereby, lines selected could only be selected as recorded selection method in the experiment. ( 3 ) and then, selection was carried out from spring sowing line selected into summer sowing in same line with tps to select plants. these plants through the intercrossing selection had been combined with sterility and tps. in this way, a new selection protocol for selection sterile line with tps was formed. it mainly involves the spring and summer sowing method, recorded selection method and the intercrossing selection method

為了選育新類型玉米雄性核不育系，提出了為玉米核不育性添加溫光敏感性的設想和選擇與鑒定相結合的策略，同時應用分期播種的方法為作物提供不同的生長和發育的環境條件，以鑒定玉米雄穗的育性變化和對不同環境條件溫光的反應.研究結果表明，春播環境下可鑒定和選擇玉米的不育性，夏播環境下可鑒定和選擇其溫光敏感性.針對玉米核不育性難以找到保持系的特性，結合兩種播期選擇兩種性狀.但春播環境下選擇的不育性群體難以通過選擇單株來保持其不育性，為記錄性群體選擇.通過從春播入選的雜合不育性優良株系群體轉移到其對應的夏播溫光敏感性入選的同一優良群體中進行優良單株選擇，能逐漸使不育性和溫光敏感性相結合而選育出純合溫光敏不育系.這種新的選擇程序主要包括應用分期播種法、記錄性選擇法和春夏兩季交叉式選擇法，使含有不育基因的可育株系逐步累積不育基因並增加了溫光敏感性而育成玉米溫光敏不育系

This study dealt with the identification and evaluation of 8 maize populations from tropical and subtropical regions under the ecological conditions in zhengzhou, henan. results showed that the significant delaying days to shed and days to silk, discoordinating for the development of male and female, higher plant and ear height, more leaf numbers, high barreness, worse performance of ear traits compared with the ck ( temperate population ) were found, which showed the tropical and subtropical populations could not be utilized directly under the ecological conditions in zhengzhou. by using selection and improvement the tropical and subtropical populations can be used to broaden the genetic base of temperate maize breeding, beause of the greater genetic variation and higher selection potential within each population. the different performances of the sensitivity to photoperiod were observed among different tropical and subtropical populations and different traits. the asi, time to silk, ear height, leaf numbers, grain yield per ear could be used as the good evaluation traits for identifying the sensitivity to photoperiod

對8個熱帶、亞熱帶玉米群體在鄭州生態條件下的表現進行鑒定和評價，結果表明，熱帶、亞熱帶群體散粉、吐絲期顯著延遲，雌雄不協調，植株和穗位高、葉片數增多、空稈率高，結實性差，果穗性狀均明顯劣於溫帶對照，在鄭州生態條件下不能直接利用，但是群體內具有較大的遺傳變異和選擇潛力，可以用來拓寬現有玉米種質的遺傳基礎；不同熱帶、亞熱帶群體的光周期敏感性不同；不同性狀對光周期反應的敏感程度不同， asi 、吐絲期、穗位高、葉片數、穗粒重可作為鑒定光周期敏感性的較好指標

A detailed literature review of physiological effects of light on laying hens was undertaken, with reference on the effects of light intensity, photoperiod and light color on the ontogenetic, survive, feeding, growth, reproduce abilities, in order to provide some information for research work and application in this field in the future

摘要本文綜述了光照對蛋雞生理學特徵影響的研究進展，主要涉及光照周期、光照強度和光色對蛋雞個體生長發育、存活、攝食、生長、繁殖等方面的研究進展，以期為我國進行該領域的研究和指導養殖實踐提供一定的參考。

Allelochemicals ' activity varies with temperature, photoperiod, water and soils during natural processes, with its initial concentration, compound structure and mixed degree during functional processes, with plant accessions, tissues and maturity within - species, and with research techniques and operation processes

化感物質活性在自然過程中，由於溫度、光周期、水和土壤等的不同而變化，在功能過程中隨其初始濃度、化合物結構和混合程度不同而變化，在植物體內由於組織器和成熟程度不同而變化，而研究技術和操作過程也影響化感物質的活性。