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| Influence of irrigation and drainage mode on water requirement content and fruit yield of tomato cultivated in rainshelter |
| SHAO Guang-Cheng, 蓝Jing-Jing , TONG Dao-Bin, CHEN Chang-Ren, ZHANG Chao-Bo |
| (1. Key Laboratory of Efficient IrrigationDrainage and Agricultural SoilWater Environment in Southern China, Ministry of Education, Nanjing, Jiangsu 210098, China; 2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 3. Sucheng Water Affairs Bureau, Suqian, Jiangsu 223800, China; 4. Water Conservancy Bureau of Jiangsu Province, Nanjing, Jiangsu 210029, China) |
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Abstract In order to realize watersaving, good quality and high yield of tomato in Southern China, the influence of irrigation and drainage mode on water demand and fruit yield under rainshelter condition was studied. The results showed that the soil moisture reduces steadily with time in various deficit irrigations, and it drops off more quickly when the underground pipes are in the depth of 0.8 m than that when the pipes in the depth of 0.6 m; however, the moisture curves against time don't show a significant difference in those cases. The evapotranspiration of tomato was quite different at three growth stages of tomato, namely, it declines in the following subsequence of the growth stage, blossoming and fruitsetting, fruit maturing and harvest, seedling; moreover, the daily evapotranspiration usually shows a rising trend with growth of tomato. The ranges of daily evapotranspiration for tomato are 1.07-2.71 mm/d in seeding stage, 1.60-3.09 mm/d in blossoming and fruitsetting period, and 1.78-3.35 mm/d in fruit maturing and harvest period for the different irrigation and drainage modes and under the rainshelter cultivation condition. The tomato fruit yield is reduced, but the wateruse efficiency and irrigation water use efficiency are increased with decreasing irrigation amount in the same drainage depth of underground pipes. These outcomes can provide a reference for selection of irrigation and drainage mode to realize watersaving, good quality and high yield of tomato under the rainshelter cultivation condition in Southern China.
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Received: 26 April 2012
Published: 31 January 2013
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