[Objective] The aim was to explore the change of illumination resources of protected agriculture in frost period to lay foundation for sustainable development of protected agriculture. [Method] The characters of illum...[Objective] The aim was to explore the change of illumination resources of protected agriculture in frost period to lay foundation for sustainable development of protected agriculture. [Method] The characters of illumination changes of protected agriculture in production period were analyzed based on climate tendency and stan- dard deviation in 1961-2010. [Resull] The production period of protected agriculture is from October to April of following year, when both of solar radiation and illumina- tion hour were declining and climate tendencies were -0.066 9 and -2.036 9 h/y. In 2001-2010, daily illumination hour reduced 0.49 h. Additionally, from December to February of the following year, total solar radiation and illumination hour were de- clining and the climate tendencies were -0.019 2 and -0.458 9 h/y. In general, the reduction of illumination resource significantly affects protected agriculture. Therefore, structure of greenhouse and management of cultivation should be improved to pro- mote protected agriculture. [Conclusion] The research provides references for pro- tected agriculture development in western part of Liaoning.展开更多
Climate change has an impact on various climatic variables. In this study our focus is mainly on temperature characteristics of climate parameter. In temperate and humid regions like southern Ontario, the effect of cl...Climate change has an impact on various climatic variables. In this study our focus is mainly on temperature characteristics of climate parameter. In temperate and humid regions like southern Ontario, the effect of climate change on Frost-free days in winter is distinctive. The average annual temperature is going upward but the extreme increase is in the winter temperature. Winter average temperature is going up by about 2˚C. However, extreme daily minimum temperature is going up by more than 3˚C. This climate effect has a great impact on the nature of precipitation and length of frost-free days. The snowfall over winter months is decreasing and the rainfall is increasing. However, the number of frost-free days during late fall months, early winter months, late winter months and early spring months are increasing. This result reveals an increase in length of the growing season. This research focuses on the effect of change in climatic variables on Frost-free days in Southern Ontario. Therefore, special attention should be given to the effect of change in climate Frost-free conditions on length of crop growing in winter season for potential investigation.展开更多
基金Supported by Application and Promotion of Breeding, Introduction and Cultivation Technology of New Variety of Vegetable in Liaoning (2008209001)~~
文摘[Objective] The aim was to explore the change of illumination resources of protected agriculture in frost period to lay foundation for sustainable development of protected agriculture. [Method] The characters of illumination changes of protected agriculture in production period were analyzed based on climate tendency and stan- dard deviation in 1961-2010. [Resull] The production period of protected agriculture is from October to April of following year, when both of solar radiation and illumina- tion hour were declining and climate tendencies were -0.066 9 and -2.036 9 h/y. In 2001-2010, daily illumination hour reduced 0.49 h. Additionally, from December to February of the following year, total solar radiation and illumination hour were de- clining and the climate tendencies were -0.019 2 and -0.458 9 h/y. In general, the reduction of illumination resource significantly affects protected agriculture. Therefore, structure of greenhouse and management of cultivation should be improved to pro- mote protected agriculture. [Conclusion] The research provides references for pro- tected agriculture development in western part of Liaoning.
文摘Climate change has an impact on various climatic variables. In this study our focus is mainly on temperature characteristics of climate parameter. In temperate and humid regions like southern Ontario, the effect of climate change on Frost-free days in winter is distinctive. The average annual temperature is going upward but the extreme increase is in the winter temperature. Winter average temperature is going up by about 2˚C. However, extreme daily minimum temperature is going up by more than 3˚C. This climate effect has a great impact on the nature of precipitation and length of frost-free days. The snowfall over winter months is decreasing and the rainfall is increasing. However, the number of frost-free days during late fall months, early winter months, late winter months and early spring months are increasing. This result reveals an increase in length of the growing season. This research focuses on the effect of change in climatic variables on Frost-free days in Southern Ontario. Therefore, special attention should be given to the effect of change in climate Frost-free conditions on length of crop growing in winter season for potential investigation.
