Under the extremely cold climatic condition,crops have to survive severe heat stress conditions,even if they are being kept in greenhouses.In the winter and spring of North China,the air and soil temperature is low in...Under the extremely cold climatic condition,crops have to survive severe heat stress conditions,even if they are being kept in greenhouses.In the winter and spring of North China,the air and soil temperature is low inside the greenhouse,and when using a traditional heating system,the energy consumption is high.This paper reports on a study of different design solutions for a root zone heating system based on a kind of low temperature radiation material.Root zone heating systems offer increasing crop quality and productivity.A novel type of heat preservation and root zone heating system was applied in greenhouse seedling.And through multiple experiments,the effect of the root zone heating system on the ambient environment and seedbed surface was studied,and the heat preservation effect and heating uniformity were discussed.Results show that single-layer film covering on the root zone heating system can make the average temperature at night increase 1°C.And the average seedbed surface and substrate temperature can increase 11.3°C and 5.2°C,respectively.In conclusion,the root zone heating system can effectively improve the environmental temperature of seedling and the uniformity of heating is high,which provides a strong guarantee for high-quality seedling cultivation.展开更多
Heating greenhouse is indispensable for plant development particularly in winter when the air temperature is lower.In that sense,root zone heating is more energy-saving than traditional air heating.The current work wa...Heating greenhouse is indispensable for plant development particularly in winter when the air temperature is lower.In that sense,root zone heating is more energy-saving than traditional air heating.The current work was devoted to the study of the effect of two root zone heating systems based on carbon crystal electrothermal film and low temperature hot water pipe on the microclimate and tomato yield in solar greenhouse.And their performance was tested in the coldest period of winter in Yongqing County of Hebei Province.The results showed that the use of root zone heating system can improve the average substrate temperature by 6.8℃.This microclimate improvement had a positive impact on tomato production.The output per square meter has increased by 19%compared to the unheated.It was also noted that the presence of root zone heating leads to a decrease in the development of disease in heated areas.Based on these results,the root zone heating system can be an effective method of improving the environmental temperature of crop plant,which is of great significance for increasing crop yield.展开更多
为研究根区土壤加温对塑料大棚内红地球葡萄休眠期至萌芽期生理特性及芽萌发的影响,试验以5年生红地球葡萄为试材,在需冷量满足后进行根域加温处理,设置(20±2)℃(以下简称T_(20℃))和对照(CK)2个温度梯度,观测芽体萌发进程、测定...为研究根区土壤加温对塑料大棚内红地球葡萄休眠期至萌芽期生理特性及芽萌发的影响,试验以5年生红地球葡萄为试材,在需冷量满足后进行根域加温处理,设置(20±2)℃(以下简称T_(20℃))和对照(CK)2个温度梯度,观测芽体萌发进程、测定休眠期至萌芽期葡萄1年生枝条和10、20、30 cm 3个深度根系的氨基酸含量、可溶性耱含量和IOD活性的变化。结果表明:塑料大棚促早栽培通过根区土壤加温,可提高土壤温度约9.9℃,T_(20℃)处理比对照提早6 d解除休眠;休眠期葡萄枝条和根系内氨基酸含量、可溶性耱含量、IOD活性均迅速升高,但升温管理后T_(20℃)处理下根系和枝条氨基酸含量、可溶性糖含量、IOD活性均迅速下降;CK处理下根系和枝条氨基酸和可溶性糖含量下降缓慢,IOD活性先上升后下降,且T_(20℃)处理根系和枝条各个生理指标的含量或活性均低于CK。其中T_(20℃)处理下根系和枝条氨基酸含量、可溶性糖含量、IOD活性的最高值均比对照出现的早,表明T_(20℃)处理有提早解除休眠的趋势。适当的提高土壤温度可以使葡萄提早解除生态型抑制休眠,提前进入萌芽,提早上市。展开更多
基金This work was financially supported by the National Key Research and Development Program of China(Grant No.2017YFD0701500)and the Hebei Province Key Research and Development Program(Grant No.19227214D).
文摘Under the extremely cold climatic condition,crops have to survive severe heat stress conditions,even if they are being kept in greenhouses.In the winter and spring of North China,the air and soil temperature is low inside the greenhouse,and when using a traditional heating system,the energy consumption is high.This paper reports on a study of different design solutions for a root zone heating system based on a kind of low temperature radiation material.Root zone heating systems offer increasing crop quality and productivity.A novel type of heat preservation and root zone heating system was applied in greenhouse seedling.And through multiple experiments,the effect of the root zone heating system on the ambient environment and seedbed surface was studied,and the heat preservation effect and heating uniformity were discussed.Results show that single-layer film covering on the root zone heating system can make the average temperature at night increase 1°C.And the average seedbed surface and substrate temperature can increase 11.3°C and 5.2°C,respectively.In conclusion,the root zone heating system can effectively improve the environmental temperature of seedling and the uniformity of heating is high,which provides a strong guarantee for high-quality seedling cultivation.
基金support provided by Hebei Province Key Research and Development Program(Grant No.21327210D)Independent Research and Development Plan of Academy of Agricultural Planning and Engineering,Ministry of Agriculture and Rural Affairs(Grant No.SP202101,Grant No.QD202107).
文摘Heating greenhouse is indispensable for plant development particularly in winter when the air temperature is lower.In that sense,root zone heating is more energy-saving than traditional air heating.The current work was devoted to the study of the effect of two root zone heating systems based on carbon crystal electrothermal film and low temperature hot water pipe on the microclimate and tomato yield in solar greenhouse.And their performance was tested in the coldest period of winter in Yongqing County of Hebei Province.The results showed that the use of root zone heating system can improve the average substrate temperature by 6.8℃.This microclimate improvement had a positive impact on tomato production.The output per square meter has increased by 19%compared to the unheated.It was also noted that the presence of root zone heating leads to a decrease in the development of disease in heated areas.Based on these results,the root zone heating system can be an effective method of improving the environmental temperature of crop plant,which is of great significance for increasing crop yield.
文摘为研究根区土壤加温对塑料大棚内红地球葡萄休眠期至萌芽期生理特性及芽萌发的影响,试验以5年生红地球葡萄为试材,在需冷量满足后进行根域加温处理,设置(20±2)℃(以下简称T_(20℃))和对照(CK)2个温度梯度,观测芽体萌发进程、测定休眠期至萌芽期葡萄1年生枝条和10、20、30 cm 3个深度根系的氨基酸含量、可溶性耱含量和IOD活性的变化。结果表明:塑料大棚促早栽培通过根区土壤加温,可提高土壤温度约9.9℃,T_(20℃)处理比对照提早6 d解除休眠;休眠期葡萄枝条和根系内氨基酸含量、可溶性耱含量、IOD活性均迅速升高,但升温管理后T_(20℃)处理下根系和枝条氨基酸含量、可溶性糖含量、IOD活性均迅速下降;CK处理下根系和枝条氨基酸和可溶性糖含量下降缓慢,IOD活性先上升后下降,且T_(20℃)处理根系和枝条各个生理指标的含量或活性均低于CK。其中T_(20℃)处理下根系和枝条氨基酸含量、可溶性糖含量、IOD活性的最高值均比对照出现的早,表明T_(20℃)处理有提早解除休眠的趋势。适当的提高土壤温度可以使葡萄提早解除生态型抑制休眠,提前进入萌芽,提早上市。
