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Effects of biogas slurry fertilization on fruit economic traits and soil nutrients of Camellia oleifera Abel

机译:沼液施肥对油茶果实经济性状和土壤养分的影响

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摘要

Camellia oleifera Abel (C. oleifera) absorb nutrients from surrounding soils and its yield is highly influenced by these nutrients and by fertilizer application. Thus, the soil nutrients play a central role in C. oleifera production. This study investigated the effects of biogas slurry applications on soil nutrients and economic traits of C. oleifera fruits. Five different amounts of biogas slurry (0, 10, 20, 30, or 40 kg/plant/year, three applications per year) were used as fertilizer for C. oleifera plants in 2015 and 2016. The nutrients of rhizosphere soil and the economic traits, including fruit yield, seed rate, and oil yield of C. oleifera fruit, were measured each year. The results showed that fertilization with biogas slurry significantly increased soil organic matter, available nitrogen (N), phosphorus (P), and potassium (K) both in 2015 and 2016. Increases in soil available N, P, and K were maximal in the highest slurry application group followed by the second highest application group. The oil yield correlated with the content of soil available P in both 2015 and 2016, and with soil organic matter in 2015. Fertilization with biogas slurry decreased the saturated fatty acid content in fruit but had no effect on the unsaturated fatty acid content. In conclusion, fertilization with biogas slurry increased rhizosphere soil nutrients and fruit economic traits of C. oleifera and rates of at least30 kg/plant/year had the most positive effects. This study expands the knowledge of fertilization with biogas slurry in C. oleifera production.
机译:油茶Abel(C. oleifera)从周围土壤吸收养分,这些养分和肥料的施用对它的产量有很大影响。因此,土壤养分在油茶的生产中起着核心作用。本研究调查了沼液施用对油茶果实土壤养分和经济性状的影响。 2015年和2016年,使用了五种不同量的沼液(0、10、20、30或40公斤/植物/年,每年3次施用)作为油茶植物的肥料。根际土壤的养分与经济每年测量包括油茶果实的果实产量,种子率和油产量的性状。结果表明,在2015年和2016年,沼液施肥显着增加了土壤有机质,有效氮(N),磷(P)和钾(K)。在土壤中,有效氮,磷和钾的增加最大。最高的浆料应用组,其次是第二高的应用组。 2015年和2016年的含油量与土壤有效磷含量以及2015年的土壤有机质含量相关。沼液施肥降低了水果中的饱和脂肪酸含量,但对不饱和脂肪酸含量没有影响。综上所述,沼液施肥增加了油茶的根际土壤养分和果实经济性状,每株/年至少30 kg的增产效果最为显着。这项研究扩展了油茶生产中沼液施肥的知识。

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