Effects Of Alternative Partial Rootzone Irrigation (APRI) On Growth, Photosynthesis And The Antioxidant Enzyme Activity Of Strawberry In Greenhouse

In this experimentation, strawberry as the material of experimentation, from 2007 to 2008 has been planted in a greenhouse. We researched the effect of APRI on Strawberry in the activities of SOD, POD, CAT, the content of soluble protein and MDA, photosynthesis, physiological and biochemical targets, the state of growth and output, respectively. The objective is through researching physiological and biochemical targets, the state of growth and output, to discusse the practicality and maneuverability of APRI on the production of strawberry. The results were as follows:(1) Two kinds of irrigation methods, after irrigation shortly photosynthesis was limited, it was the result of nostomatal limit. The limit on photosynthesis of strawberry with APRI treated in four hours, was unchained, photosynthesis gradually increased.(2) For the whole process of APRI, the photosynthesis of strawberry decreased, which was the result of stomatal limit.(3) APRI could renew the photosynthesis after irrigation, which carried out by raising the ability of adapting the strawberry to environmental changes, and reducing the limited of nostomatal. After irrigation, the activity changes of SOD, POD and CAT, the content of MDA, soluble protein of the Strawberry under APRI treatments were abated, which showed that the strawberries under APRI treatments had the stronger resistance.(4) The change of the activity of SOD, CAT, POD and the content of MAD and soluble protein were in the control of strawberry with APRI and did not cause irreversible injury. After 15 days consecutive mensuration, it showed that the activity of SOD, CAT, POD and the content of MAD, soluble protein had not drastic change, and after irrigation they could quickly return to normal levels, so the injury of APRI on strawberries could resume, strawberry could grow normally.(5) APRI increased the content of dry matter in various organs of strawberry. The dry matter in roots, stems and leaves of strawberry was increased.(6) APRI had not obvious affected on the production of strawberry. The yield of strawberry with APRI saved water by 47.12 %. APRI in planting strawberry has the real significance of saving water, doable and being generalized.