Bio:
Email: guoxinsong1028@163.com
郭新送(1987—),男,硕士,从事土壤生态学方面的研究;guoxinsong1028@163.com
为探讨花生壳在不同裂解温度(350 ℃和700 ℃)下形成的生物炭(BT350和BS700)配施外源锌对番茄光合特性及镉吸收的影响,开展了盆栽试验研究。试验结果表明:BS700配施外源锌可显著促进番茄地上部干物质累积,且叶片的相对叶绿素含量(SPAD)值与外源锌喷施浓度呈正相关,果实干物质累积量和SPAD值分别比BT350提高10.59%~13.89%和5.42%~14.77%;BS700能显著增强番茄叶片的净光合速率和蒸腾速率,平均分别比BT350提高8.82%和32.97%,同时BS700喷施低剂量的外源锌即能大幅提高番茄叶片净光合速率和蒸腾速率;BS700能显著减少番茄中镉的累积量,并以在果实中的效果明显,其镉吸收量比BT350降低7.62%~29.52%,且配施低剂量外源锌抑制番茄对镉的吸收效果优于BT350配施高剂量外源锌的效果。
In Order to investigate peanut shell biochar (BT350 and BS700), which are formed at different decomposition temperatures (350 ℃ and 700 ℃), with exogenous zinc on photosynthetic characteristics and absorption cadmium of tomato, pot experimental study is carried out. Experimental results show that BS700 with exogenous zinc can promote accumulation of dry matter of above ground part of tomato, and the relative chlorophyll content of leaves (SPAD) has positive correlation with the spray concentration of exogenous zinc, fruit dry matter accumulation amount and SPAD value increase by 10.59%~13.89% and 5.42%~14.77% than that of BT350 respectively; BS700 can strengthen significantly the net photosynthetic rate and transpiration rate of tomato leaves, which, on an average, increase by 8.82% and 32.97% respectively, at the same time, BS700 with spraying low dose of exogenous zinc can increase greatly the net photosynthetic rate and transpiration rate of tomato leaves; BS700 can significantly reduce accumulation amount of cadmium in tomato, it has obvious effect on fruit, its accumulation amount of cadmium decreases by 7.62%~29.52% than that of BT350, its suppression effect of absorption cadmium with low dose exogenous zinc is superior to that of BT350 with high dose of exogenous zinc.
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