不同基质通透性对草莓生长及光合特性的影响

试验以草莓为试材,研究4种不同通透性的基质对草莓生长和光合特性的影响.结果表明,添加炉渣和草炭的基质容重变小,通气状况明显改善,为草莓根系发育创造良好的通气条件,形成强大的根系,促进养分的吸收利用和植株地上部的发育,捕获光的能力得到加强,但叶片质量有所下降,使叶片气孔导度下降,减少了CO2的吸收,影响了光合速率,同时降低蒸腾速率,提高水分利用效率,使植株光合产物积累增多,产量提高.而添加腐叶土的基质容重变大,通气孔隙变小,不利于植株根系发育,影响养分吸收、植株发育和产量形成.

Effect of Different Medias Aeration on Growth and Photosynthetic Characteristic of Strawberry

The effects of four different medias aeration on growth and photosynthetic characters of strawberry plant were studied by using strawberry as materials. The results showed that the density of medias applied slag and peat became smaller, aeration condition significantly improved, forming greater root system, promote shoot nutrition uptake, plant above development, and strengthen activities of capturing light, but qualities of leaves became decline, that reduced stomatal conductance, the absorption of CO2 ,and affected photosynthetic efficiency, at the same time, that lowered transpiration rate, improved water use efficiency, plant accumulation of photosynthetic products and increased yield, and the density of medias applied rotten leaves became bigger, Ventilative porosity became smaller, that were not good for root development, affected root nutrition uptake, plant development and yield.