Effect Of Soil Water On Growth Development And Some Physiological Characteristics In Tomato

"L402"was used to determined the effects of different soil water content on growth, yield, quality, activites of protective enzymes, osmotic adjustment, and photosynthesis characteristics and photoprotection mechanisms in different seasons, and analyze function of different soil water content in tomato growth period, aiming to put forward water management and utilization methods during tomato production.1. The results indicated, the plant height, stem diameter and the fresh weight of every organs with 80% treatment were increased; the setting rate with 50% treatment was lower, but the setting rates and yields of 80% and 65% treatments was increased. The yields with 80% and 65% treatments were higher than this of 50% treatment by 35.31% and 27.73%.2. Root system activity was decreased and MDA and electrolytic leakage of the leaf were increased by soil water stress. Activites of SOD, CAT, POD were significantly increased in growth prophase, and falled down in anaphase. Meanwhile, the proline and souble sugar were increased and souble protein was decreased by water stress. Therefore, it was made clear that proline and souble sugar were important osmotic adjustment substances, but souble protein might have no effect during osmotic adjustment of tomato.3. Different soil water content had different effects on photosynthesis and fluorescence characteristics in different seaon tomato. In spring, Pn and Tr of tomato with 80% soil water content treatment in growing period was the...