| Cultivation under structure is rapidly growing in recent years, and it plays a significant role in vegetable production day by day, which becomes a main means of vegetable production. With the improvement of engineering technique for facilities, the intellect control which affect the factors of environment in facilities for cultivation under structure is increasingly received attention. Cucumber (Cucumis Sativus L.) of ChangChun MiCi and tomato (Lycopersicon esculentum Mill.) of ZhongZa No.9 were used as experiment materials to measure environmental factors and yield during growth phase of vegetable, and on the basis of studying the dynamic relations between environmental factors and yield. It can be the theoretical basis to environmental conditioning of cultivation under structure. The research results are as follows:There is consistency between change curve of per day production and change curves of per day environmental factors in the analytic statistical periods, so it can be investigated quantitatively between their interrelations. At the same time, main environmental factors that affected vegetable production formation are different according vegetables are different in every analytic statistical period, so it can be provided appropriate environment targets to be suited for cultivation under structure.Dividing pots of time interval of four accumulative air temperature are different in a day. Tomato made use of the second dividing method during No. 1 to No. 9 plucking time, namely 6, 14, 19, 23 olock; and tomato made use of the first dividing method during No. 10 to No. 15 plucking time, namely 6, 12, 18,24 olock; and tomato made use of the third dividing method during No. 16 to No. 18 plucking time, namely 6, 13, 17, 22 olock. Cucumber made use of the first dividing method during No.10 to No.14 plucking time, namely 6,12,18,24 olock; and cucumber made use of the third dividing method during the other plucking time, namely 6,13,17,22 olock.?Using stepegression analysis method, cucumber can be obtained different regression equations in different growth phases.Initial stage of fructescenceo. 1 to No. 4 plucking time. The regression equation that can be obtained is as follow:IIY= -2.170+0.038 X10+0.003 X7(Y stands for yield, X0 stands for cumulative temperature of after midnight, X7 stands for cumulative temperature of the morning).Middle stage of fructescence桸o. 3 to No. 13 plucking time. The regression equation that can be obtained is as follow:Y8.6060.455 Xc+0.653X2+0.015X8(Y stands for yield, X~ stands for maximum temperature, X stands for soil temperature, X~ stands for cumulative temperature of the afternoon).Last stage of fruetescence桸o. 14 to No. 21 plucking time. The regression equation that can be obtained is as follow:Y=15.583?. 169X4+0.088X3?. 155X ?.013X(Y stands for yield. X stands for air humidity, X: stands for soil humidity, X. stands for sunshine time, X. stands for cumulative temperature of after midnight).Using step梤egression analysis method, tomato can be obtained the regression equations in whole growth phases. The regression equation from No. 1 to No. 18 plucking time that can be obtained is as follow:Y= -16.857+0.031 X8+0.692 X2(Y stands for yield, X8 stands for cumulative temperature of the afternoon,X~ stands for soil temperature).?In the similar environmental conditions, environmental factors that affecteddifferent vegetable yield formations are different from June 22 to July 7.Environmental factors that affected cucumber yield formation are mainly air humidity, minimum temperature, soil temperature and cumulative temperature of the afternoon in this phase. Environmental factors that affected tomato yield formation are mainly soil temperature and soil humidity in this phase.?According to step- regression analysis, it can be obtained the fitting ranges for reference of soil temperature, cumulative temperature of the morning, cumulative temperature of the afternoon, cumulative temperature of before midnight,... |
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