日照时数

林场内日照时数可减少30%；

The duration of sunshine in the station decreases by 30 per cent .

影响脂肪含量的综合气候关键期为9月上、中旬（鼓粒中后期），主导气象因子是日照时数。

But fat content was mainly influenced by the climatic conditions of September 1-20th in which duration of sunshine was key factor .

纬度越高，年日照时数越长，土壤pH值越高，越不利于果实内杜仲胶的形成，果实含胶率越低；

Higher latitude , more sunlight hours and higher pH value made against the formation of gutta-percha in seed that resulted in lower gum content .

NDVI与风速和日照时数的相关性较差。

NDVI had bad correlations with wind speed and hours of sunshine .

玉溪地区较低的温度和较长的日照时数有利于SPS活性的升高。

The lower temperature and more light hours were beneficial to increase SPS activity .

在此基础上，依据具有时迟效应的Logistic模型，分别利用温度、日照时数的累积代替Logistic模型的时间变量对其进行改进，再结合栽培因子和气象影响模型构建综合模拟模型。

The Logistic model with time - lag effect was improved by substituting accumulate temperature and sun - times for variable t in it .

近年来，日照时数延长和降水增多有利于春小麦NDVI的增加及产量的提高。

The status that sunshine duration and precipitation increase recently is beneficial to increasing of NDVI and yields of spring wheat .

日照时数对烟叶化学成分的影响主要体现在还原糖、总氮和C1上。

Sunshine hours on the chemical composition of tobacco is mainly reflected in the reducing sugar , total nitrogen and Cl.4 .

日照时数在5～10h；

Sunshine hour between 5 and 10 ;

抽穗期SPAD、LAI和结实期日照时数，可以解释不同年度、季节和不同氮肥处理的稻谷产量变异的86%。

About 86 % of variation in grain yield could be explained by leaf color , LAI at heading and sunshine hours during grain-filling .

日照时数（H）是影响抚顺地区参考作物需水量ET0最主要因素。抚顺地区ET0空间变化也较大，从山区到绿洲平原ET0多年平均值呈递增趋势，ET0与海拔高度呈显著负相关。

Spatial variation of ET_0 values was obvious and the value was increasing from mountainous area to plain in Fushun Region .

石河子地区近47a日照时数变化特征分析

Variation of Sunshine Hour since Recent 47 Years in the ShiHeZi Area

使用Mann-Kendall法进行突变检测表明，商丘市年日照时数和各季节日照时数在1982年存在突变现象。

By the abrupt change detecting with Mann-Kendall , the results showed that , the yearly and seasonal sunshine hours abruptly change in 1982 .

利用本模型和Citystar及其500m×500m网格的地理数据，计算湖南省年日照时数、年太阳总辐射。

Calculating annual sunlight times and solar global radiation in Hunan province based on the model 、 Citystar GIS and its 500m × 500m grid geographical datum .

日照时数1019～2323h，大部地区偏少10～412h。

Sunshine hours are 1019 ~ 2323h , less by 10 ~ 412h in most parts .

纤维长度与铃龄15～25d的日照时数关系密切，此时正值纤维伸长盛期；

Fiber length was closely relative to the sunshine hours during 15 - 25d after flowering , which was vigorous stage of fiber elongating , also .

当气温、日照时数、平均风速的变化量从-20%变化到20%时，ET0表现为逐渐增加的趋势，当平均相对湿度的变化量从-20%增加到20%时，ET0则逐渐减小；

Daily ET0 also increased with temperature , sunshine hours and mean wind speed changed from-20 % to20 % , while daily ET0 decreased with average relative humidity changed from-20 % to20 % .

并分析了平均气温、平均最高气温、年日照时数、平均风速、平均相对湿度、年降水量、年蒸发量、海拔高度与ET0的相关性，各站ET0与平均相对湿度相关性最好；

The correlations of average temperature , average maximum temperature , annual sunshine hours , average wind speed , average relative humidity , annual rainfall , annual evaporation and altitude with ET_0 were analyzed .

冬小麦生育期内EVI均值与平均温度、降水量、日照时数相关性分析结果显示，温度和降水是冬小麦生长的主要限制因子，其中温度起主导作用。

The analysis on the relativity between average EVI values within winter wheat growing period and average temperature , rainfall , hours of sunshine shows that temperature and rainfall are the main limiting factors , among them temperature plays the leading role .

结果表明：阳泉市50a来降水呈下降趋势（-35.8mm/10a），气温呈上升趋势（0.2℃/10a），日照时数变化呈减少趋势。

The results show that the precipitation has descending trend ( - 35.8mm / 10a ) and temperature has ascending trend ( 0.2 ℃ / 10a ) in the recently 50 Years . At the same time , insolation duration is decreasing gradually .

水稻品种所需温光资源量：早、中熟中粳需积温3300～3900℃，日照时数700～1000h；

To complete the growth stage . various varieties need the resources of temperature and light : The early-ripen and mid-ripen of mid-season japonica need accumulation of the temperature of 3300 ~ 3900 ℃, sunshine hour number 700 ~ 1000h ;

暗岛效应在一定程度上影响了城区日照时数的变化。（2）流域50a来气温均在变暖，其倾斜率达到0.321℃/10a。中游和下游的增温幅度明显大于上游。

Dark island effect to some extent , affected the city sunshine duration changes . ( 2 ) The temperature of River is warming in recent 50a . Climatic trend rate is 0.321 ℃ / 10a . Middle and lower reaches of the temperature were much higher than the upstream .

日照时数是地面气象观测的要素之一。

The sunshine duration is an element of surface meteorological observation .

我国日照时数和总辐射的空间分布场

Spacial distribution field of sunshine duration and global radiation in China

最适群体指数随着结实期日照时数的增加而提高。

The optimum population index increased as sunshine hours increased .

系统配置以北京地区日照时数设计；

The system configuration is based on sunshine duration in Beijing area .

降水、温度和日照时数的随机生成模型和验证

Stochastic Simulation Model and Its Verification of Precipitation , Temperature and Sunshining

日照时数与日照百分率变化趋势不完全相同；

The monthly variation tendency of sunshine hours and relative sunshine is different ;

日照时数为影响脂肪含量的主导气象因子。

The sunshine duration was the leading climatic factor affected the fat content .

乌鲁木齐及昌吉两城市发展对日照时数的影响分析

Impact of urbanization on sunshine hour in Urumqi-Changji Area