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| Effect of Different Covering Method and Irrigation Amount on Cabbage Water Utilization and Dry Matter Accumulation |
| LI Juan1，FAN Feng-cui2，SHI Yu-fang2，LI Zhi-hong2*，GAO Li-hong1，LIU Sheng-yao2 |
| 1Institute of Vegetables，College of Agro-Bio Technology，China Agricultural University，Beijing 100193，China|2Agricultural Information and Economic Research Institute，Hebei Academy of Agriculture and Forestry Sciences，Shijiazhuang 050051，Hebei，China |
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Abstract In order to study the effect of different covering method and irrigation amount on cabbage（Brassica oleracea L. var. capitata L.）water utilization and dry matter accumulation，we used conventional irrigation amount of 450 m3•hm-2 time without plastic film mulching as control．The results showed that along with the increase of irrigation amount，the amount of percolation，evaporation and transpiration also increased，among which the amount of percolation and transpiration of the film hole irrigation treatments are larger than without plastic film mulching treatment．At the same time，soil water storage decreased along with the increasing of irrigation water．Dry matter accumulation of cabbage and root dry weight of 0-10 cm and 0-30 cm depth increased and 10-30 cm depth decreased after treatment without plastic film mulching．Dry matter accumulation of cabbage decreased after increasing irrigation amount，but the root dry weight in different layers of soil decreased after decreasing irrigation amount under the treatments of the film hole irrigation．Decreasing irrigation amount reduced the yield， but increased WUE，and the yield and WUE of film hole irrigation treatments were higher than without plastic film mulching treatment．Considering cabbage production and water-saving，300 m3•hm-2 time in conventional irrigation or 150 m3•hm-2 time in film hole irrigation have better efficiency than the others. So it is worthwhile to popularize in vegetable production.
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Received: 10 May 2011
Published: 13 June 2011
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