土壤酸化对樱桃番茄养分积累和分配的影响
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国家现代柑橘产业技术体系养分管理与化肥减施增效岗位(CARS-26)


Effects of soil acidification on accumulation and distribution of nutrients in cherry tomato
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    摘要:

    为研究土壤酸化对土壤养分有效性以及植物吸收、积累、分配养分的影响,采用盆栽试验,以酸性红壤(pH 5.05)、樱桃番茄(Lycopersivon esculentum Mill) 为试验材料,浇施柠檬酸-磷酸氢二钠缓冲液和碳酸钠碳酸氢钠缓冲液调节土壤pH,使土壤pH下调至4.0,5.0及上调至6.0和7.0,试验共4个处理,每处理5个重复,测定了土壤酸化对樱桃番茄植株生长、植株体内养分含量和积累分配的影响。结果显示,通过缓冲液调节,实测土壤pH为4.35、4.92、5.89、6.85;土壤酸化显著降低樱桃番茄叶面积、生物量尤其是根系生物量,降低植株根冠比;土壤酸化严重抑制氮、磷、钾、镁、铁在番茄根系的积累,而促进铁、锰在茎秆和钙、镁在叶片的积累分配,使根系氮、磷、钾、钙、镁、铁积累量显著降低,茎秆积累氮、钾、铁、锰较多,叶片积累磷、钙、镁较多,特别是植株各部位锰含量显著提高。结果表明,根系是樱桃番茄植株受土壤酸化抑制最严重、最敏感的部位,并因此导致多数养分被根系吸收,迁移受阻,积累显著下降。

    Abstract:

    The effects of soil acidification on soil nutrient availability and plants nutrient uptake,accumulation and distribution were investigated to provide a basis for soil acidification treatment,especially nutrient efficient utilization. Cherry tomatoes (Lycopersivon esculentum Mill) was used to conduct pot experiment with acidic red soil (pH 5.05). The soil pH was adjusted to 4.0,5.0,6.0 and 7.0 with citric acidsodium hydrogen phosphate buffer and sodium carbonate-sodium bicarbonate buffer. There were 4 treatments with 5 replicates per treatment in the experiment. The results showed that measured soil pH were 4.35,4.92,5.89,6.85,adjusted down by 0.70,0.13 and increased by 0.84 and 1.80 pH unit,respectively. Soil acidification significantly reduced the leaf area and biomass of cherry tomato,especially the root biomass,and root to shoot ratio. Soil acidification severely inhibited the accumulation of N,P,K,Mg and Fe in roots,promoted the accumulation and distribution of Fe and Mn in stem,and Ca and Mg in leaves. Soil acidification significantly decreased accumulation of N,P,K,Ca,Mg and Fe in roots. More N,K,Fe and Mn was accumulated in stems,more P,Ca and Mg was accumulated in leaves. Particularly,Mn concentration in all parts of plants was raised significantly. It is indicated that the root is the most severe and sensitive part of whole tomato plant inhibited by soil acidification and most nutrients are absorbed by the roots. Soil acidification blocked migration and reduced accumulation significantly.

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高国震,董治浩,胡承孝,谭启玲,李进学.土壤酸化对樱桃番茄养分积累和分配的影响[J].华中农业大学学报,2021,(1):179-186

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  • 收稿日期:2020-05-20
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  • 在线发布日期: 2021-02-10
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