Spatio-Temporal Characteristic of Microclimate in Kiwifruit Orchard at Different Growth Stages at the Northern Foothills of Qinling Mountains in Shaanxi Province

doi:10.11924/j.issn.1000-6850.casb2023-0522

Abstract

Abstract:

Based on the data of kiwifruit microclimate observed by Zhouzhi County Bairui Kiwifruit Research Institute at the northern foothills of Qinling Mountains in Shaanxi Province from May 2020 to December 2022, the microclimate characteristics of kiwifruit orchards in Zhouzhi at different growth stages were analyzed. The results showed that the diurnal variation of the total solar radiation and air temperature were all unimodal curves, with diurnal high and night low diurnal variation characteristics, and the total solar radiation peaked at 12:00-13:00 and the air temperature peaked at 15:00-16:00. The total radiation reached maximum at vigorous growth stage and second at initial growth stage. The daily maximum temperature at different canopy heights was the highest at the vigorous growth stage, followed by the initial period and the minimum in the dormant period. The diurnal temperature range at the initial growth stage was larger than that at vigorous growth stage and dormant stage. The temperature at each vertical height of canopy was the highest in July and the lowest in January. The daily variation of humidity showed an inverted“几”curve of high-low-high. Humidity was maximum at vigorous growth stage and the next at dormant stage. The humidity at each vertical height of canopy was the highest in October and the lowest in February. The temperature fluctuation of surface soil was bigger than that of deep soil, and the monthly change trend was consistent; the daily and monthly changes of soil moisture in each soil layer were small. The spatio-temporal characteristics of microclimate in kiwifruit orchard were studied in order to provide theoretical basis for studying the growth and decline law and quantitative relationship in the process of capacity and material exchange of kiwifruit orchard, thus improving the scientific management level of kiwifruit orchard.

Key words: Shaanxi, the northern foothills of Qinling Mountains, kiwifruit garden, microclimate characteristics, growth stage

ZHANG Weimin, WANG Jinghong, BAI Qinfeng. Spatio-Temporal Characteristic of Microclimate in Kiwifruit Orchard at Different Growth Stages at the Northern Foothills of Qinling Mountains in Shaanxi Province[J]. Chinese Agricultural Science Bulletin, 2023, 39(35): 118-124.

Figures/Tables 5

References 25

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