| The water and fertilizer management is mainly depended on experience, the technology is more extensive of traditional protected cultivation in our country. Moreover, the management is relying on manual operation with hard wok and low efficiency, the labor shortage has becomed the key problem of protected vegatable sustainable development. Therefore, innovative cultivation vegeatable management pattern and improve the level of light simplified, standardization and automation has very important significance. Therefore, this paper studied the water and nutrient requirements and fertigation methods of tomato on elevated cultivated system of closed-cycle and 3-cluster topping method in solar greenhouse.The main results as follows:1. Autumn-winter season and winter-spring season tomato water absorption of continuous irrigation was the highest and significantly higher than for the intermittent irrigation 15 min and intermittent irrigation 30 min. Autumn-winter season and winter-spring season tomato nutrient absorption of intermittent irrigation 30 min and continuous irrigation highest respectively of the whole growth period, and both to absorbed K most, N followed, P least.The daily water and nutrient absorbing throughout the growth period showed a trend of increased at first and then decreased, autumn-winter season and winter-spring season tomato daily water absorbing reached the maximum at in the third spike flowers~the first spike turn color and the first turn color~the first spike harvest. Autumn-winter season tomato daily nutrient absorption of N?P?K reached the maximum at in the first spike flowers~the third spike flowers?the third spike flowers~the first spike turn color?the first spike turn color~the first spike harvest.Winter-spring season tomato daily nutrient absorption of N?P?K reached the maximum at the third spike flowers~the first spike turn color all.The WUE and nutrient use efficiency was highest of intermittent irrigation for 15 min with autumn-winter season and winter-spring season tomato.2. Tomato daily water absorption with accumulation light intensity radiation, VPD and the average daily temperature was linearly positive correlation, with the average daily relative humidity was linearly negative correlation; the multiple correlation coefficient of their multivariate linear regression analysis equation were above 0.75, matched effect is preferable. The equation of intermittent irrigation for 15 min, intermittent irrigation 30 min, continuous irrigation with autumn-winter season tomato is:y=2.31x1-426.79x2+34.38x3-6.69x4+82.91, y=1.74x1-297.99x2+22.49x3-6.32x4+259.97 and y=1.92x1-344.95x2+29.57x3-7.11x4+ 205.50; T h e e q u a t i o n o f w i n t e r- s p r i n g s e a s o n t o m a t o i s : y =- 0. 9 3 x 1- 8 1 9. 7 5 x 2 + 1 4 2. 2 0 x 3- 3 1. 0 5 x 4 + 4 9 6. 7 0, y =- 0. 9 0 x 1- 7 8 8. 7 2 x 2 + 1 3 7. 1 5 x 3- 2 8. 8 7 x 4 + 4 1 6. 6 2, y=-1.09x1-1014.15x2+167.95x3-36.38x4+589.75(y for tomato daily water absorption, x1 for day cumulative light intensity(Klx), x2 for the VPD(Kpa), x3 for the daily average temperature(?), x4 for the daily average air humidity(%)). The correlation coefficient between t he dail y nutri ents absor pti on and envi ronm ent al factors was l ittle.3. Compared to based on substrate moisture automatic liquid supply and the daily timing automatic liquid supply, based on the automatic mode for the accumulation solar radiation, the tomato grew stronger, the fresh and dry weight increased, chlorophyll content and net photosynthetic rate increased, fruit weight and yield per plant increased, and lycopene, organic acids and free amino acid content increased, but flowering time delay, the root activity lower.4. The water use efficiency of based on accumulation solar radiation supply mode was highest. |
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