水分对有机基质栽培番茄生理特性、品质及产量的影响

以"齐粉"番茄品种为试材,研究了不同相对含水量对有机基质栽培番茄生长、生理特性、产量、品质和水分利用率的影响.结果表明:随着有机基质相对含水量的升高,番茄株高、茎粗、节间长和单株叶面积极显著增加,叶片色素含量、水势、渗透势及根系活力和果实产量显著增加,而番茄果实品质和水分利用率显著降低.从果实产量、品质和水分利用率方面综合考虑,80%基质相对含水量处理的果实产量达26 kg.m-2以上,可作为番茄有机基质栽培水分管理的量化指标;如果仅考虑果实品质,则50%基质相对含水量可以作为水分管理指标.

Effects of moisture content in organic substrate on the physiological characters,fruit quality and yield of tomato plant

With tomato cultivar Qifen as test crop, this paper studied its growth, physiological characters, fruit yield, fruit quality, and water use efficiency (WUE) under effects of relative moisture content of organic substrate. The results showed that with increasing moisture content in organic substrate, the plant height, stem diameter, node length, leaf area per plant, leaf pigment content, water potential, osmotic potential, root vigor, and fruit yield increased markedly, but fruit quality and WUE decreased significantly. Considering from the aspects of fruit yield, fruit quality and WUE, 80% moisture content of organic substrate could be used as a favorable quantitative index for the water management of tomato cultivation, under which, 26 kg x m(-2) fruit yield could be achieved. If only considering fruit quality, 50% moisture content could be used as the index for water management.