Abstract:

To calculate the climatic potential productivity of typical solar greenhouse in Heilongjiang Province and analyze its spatial and temporal distribution characteristic for making full and efficient use of limited climatic resources and providing a scientific basis for stable and high yield of facility agriculture, based on the observed data inside and outside greenhouse, the temperature prediction model was set up to simulate the temperature in the greenhouse during 1961 to 2020. The models of the photosynthetic productivity (PP) and light-temperature productivity (LTP) in solar greenhouse were established by revising the estimation model of Huang Bingwei’s photosynthetic production potential. The climatic potential productivity of different regions from 1961 to 2020 was calculated and its distribution rules were analyzed. The main conclusions are as follows: during the study period, the weather types of Lindian and Youyi were mostly sunny, followed by overcast and cloudy days. The average temperature prediction models of typical solar greenhouse were established and all of them passed the reliability test (P≤0.05). The PP and LTP of solar greenhouse during 1961 to 2020 were basically the same, which increased gradually from northeast to southwest, and decreased year by year, with the highest value in May and the lowest value in December. The minimum of PP appeared in 2015, and the maximum appeared in 2020. The minimum of LTP appeared in 1995, and the maximum appeared in 2020. In this study, the climatic potential productivity of typical solar greenhouses in different regions of Heilongjiang Province from 1961 to 2020 is obtained to lay a basis for the production layout of local solar greenhouses.

Key words: solar greenhouse, climatic potential productivity, climatic resources, facility agriculture, model