天津市保暖式钢骨架大棚越冬蔬菜生产气温适宜度及冷害风险评估

doi:10.3969/j.issn.1673-503X.2024.04.016

Abstract

Abstract:

Using the indoor and outdoor meteorological observation data from two novel insulated steel frame greenhouses in Tianjin over the period from December of 2021 to March of 2022, we applied the Random Forest (RF) method to simulate the distribution of temperature within the two greenhouses, analyzed the variation in heat resources under different climatic conditions and the temperature suitability of vegetable growing, and assessed the risk of low temperature. The results indicated that the indoor air temperature simulated by the RF method correlates highly with the measured values, with a coefficient of determination exceeding 0.85 and a consistency index D value above 0.988 in both novel insulated steel frame greenhouses. The minimum temperature within the heated insulated steel frame greenhouses is consistently maintained above 10 ℃, with minimal fluctuations, making it ideal for the cultivation of semi-tolerant and warm vegetables (with a suitability degree ranging from 0.86 to 0.97 and 0.73 to 0.90, respectively, and no risk of low temperature injury). Conventional insulated steel frame greenhouses can maintain a minimum temperature above -3 ℃, suitable for cold-hardy and half-cold-hardy vegetables (with a suitability degree ranging from 0.59 to 0.91 and 0.43 to 0.86, respectively, and a low risk of low temperature injury).

Key words: Random Forest (RF), Neural network, Overwintering crop, Heat resources

CLC Number:

P49/S626.4

Tao LIU, Chaoyang DONG, Tengge WANG, Fangying TAN, Fang LIU, Xueyan MA, Zhenfa LI. Assessment of temperature suitability and chilling injury risk for overwinter vegetable growing in insulated steel-framed greenhouses in Tianjin[J]. Journal of Meteorology and Environment, 2024, 40(4): 131-137.

Figures/Tables 8

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References 35

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蔬菜类型	常见蔬菜	温度类型	温度设置/℃
喜温蔬菜	黄瓜、茄子、辣椒等	最低气温	5
		最适气温	25
		最高气温	40
半耐寒蔬菜	萝卜、芹菜、莴苣等	最低气温	-1
		最适气温	19
		最高气温	30
耐寒蔬菜	菠菜、大葱、洋葱等	最低气温	-5
		最适气温	17
		最高气温	25

温度年型	宝坻区	西青区
偏暖年	2013年、2019年	2016年、2019年
正常年	2014年、2015年、2016年、2017年、2018年、2020年	2013年、2014年、2015年、2017年、2018年、2020年
偏冷年	2011年、2012年	2011年、2012年

蔬菜类型	月份	偏暖年	偏冷年	正常年
喜温蔬菜	12月	-479.2	-834.5	-715.9
	1月	-648.6	-965.2	-892.5
	2月	-489.3	-774.6	-639.3
	3月	-237.3	-364.2	-177.8
半耐寒蔬菜	12月	-0.1	-12.2	-9.1
	1月	-6.5	-12.7	-7.6
	2月	0.0	-4.7	-5.8
	3月	0.0	0.0	0.0
耐寒蔬菜	12月	0.0	-1.0	-0.8
	1月	0.0	0.0	0.0
	2月	0.0	0.0	0.0
	3月	0.0	0.0	0.0

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Assessment of temperature suitability and chilling injury risk for overwinter vegetable growing in insulated steel-framed greenhouses in Tianjin

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