In order to efficiently solve the shading problem between the upper layer and lower layer in the same cultivation system and between adjacent cultivation systems in multi-layer stereo-cultivation of strawberry,and to ...In order to efficiently solve the shading problem between the upper layer and lower layer in the same cultivation system and between adjacent cultivation systems in multi-layer stereo-cultivation of strawberry,and to improve the fixed A-frame system,a novel cultivation system-sun-tracking system was developed that could keep north-south line of cultivation frame parallel to sunray to make the best use of direct light.In this study,crop canopy light condition of sun-tracking and fixed systems were tested and compared.Results showed that integrated PPF of sun-tracking system is higher than that of fixed system in both middle and lower layers.On sunny day compared with fixed system,integrated PPF on middle and lower layer of suntracking system increased by 16.0%,9.1% in January and 19.6%,4.1% in February,while on cloudy day improvement on light condition of sun-tracking system is not evident as sunny days.Thus sun-tracking system can effectively alleviate shading problem between layers and improve plant canopy light environment.展开更多
SMART HOME APPLIANCES Caixin June 1one day in the future,when you walk into your home,the lights will turn on,the curtains will draw apart and the air conditioner will switch on–all of this automatically.when you lea...SMART HOME APPLIANCES Caixin June 1one day in the future,when you walk into your home,the lights will turn on,the curtains will draw apart and the air conditioner will switch on–all of this automatically.when you leave,the reverse will happen.imagine your refrigerator giving you its food inventory,complete with the expiry dates,reminding you to buy fresh food,and even buying food items online itself.with the internet of things-a scenario in展开更多
基金Supported by National Science and Technology Plan Project"Five"in Rural Areas--Plant Factory Perspective Multilayer Cultivation System and Its Key Technology and Equipment Research(2013AA103002)Modern Agricultural Industry Technology System Construction Special(CARS-25-06B)
文摘In order to efficiently solve the shading problem between the upper layer and lower layer in the same cultivation system and between adjacent cultivation systems in multi-layer stereo-cultivation of strawberry,and to improve the fixed A-frame system,a novel cultivation system-sun-tracking system was developed that could keep north-south line of cultivation frame parallel to sunray to make the best use of direct light.In this study,crop canopy light condition of sun-tracking and fixed systems were tested and compared.Results showed that integrated PPF of sun-tracking system is higher than that of fixed system in both middle and lower layers.On sunny day compared with fixed system,integrated PPF on middle and lower layer of suntracking system increased by 16.0%,9.1% in January and 19.6%,4.1% in February,while on cloudy day improvement on light condition of sun-tracking system is not evident as sunny days.Thus sun-tracking system can effectively alleviate shading problem between layers and improve plant canopy light environment.
文摘SMART HOME APPLIANCES Caixin June 1one day in the future,when you walk into your home,the lights will turn on,the curtains will draw apart and the air conditioner will switch on–all of this automatically.when you leave,the reverse will happen.imagine your refrigerator giving you its food inventory,complete with the expiry dates,reminding you to buy fresh food,and even buying food items online itself.with the internet of things-a scenario in
