不同氮磷施用量对百香果扦插苗氮磷吸收与分配的影响

    Effects of different nitrogen and phosphorus application rates on nitrogen and phosphorus uptake and distribution of Passiflora edulis Sims. cuttings

    • 摘要: 分析不同氮磷施用量对百香果扦插苗氮磷吸收与分配的影响,可为百香果栽培中科学施用氮磷肥提供参考依据。在盆栽条件下,设置不施肥对照(T1)、氮磷施用量分别为4 g·株−1和4 g·株−1(常规施肥对照,T2)、6 g·株−1和4 g·株−1(T3)、8 g·株−1和4 g·株−1(T4)、4 g·株−1和6 g·株−1(T5)、4 g·株−1和8 g·株−1(T6)共6个处理,分析百香果器官氮磷吸收量变化。结果表明:常规施肥对照(T2)与不施肥对照(T1)相比会提高百香果各器官氮吸收量;第100天,T4、T6根系氮吸收量无显著差异,两个处理分别较T2显著提高了32.72%、34.92%;T6茎氮吸收量较T2显著提高了63.84%;T4叶氮吸收量较T2显著提高了21.33%,同时T4显著高于T6;T6根、茎、叶磷吸收量分别较T2显著提高了113.90% 、52.62%和150.67%;T4根、茎磷吸收量显著低于T6,T4叶片磷吸收量与T6之间无显著差异;T4叶磷吸收量较T2显著提高了153.22%;T6、T4与T2相比会降低氮在根系和叶片中分配比例,提高茎中氮分配比例;T6、T4较T2降低了根茎中磷分配比例,提高了叶片中磷分配比例。综合分析认为,T4、T6均是促进百香果氮磷吸收的适宜处理,其中T6更优。

       

      Abstract: The effects of different nitrogen and phosphorus application rates on the uptake and distribution of nitrogen and phosphorus in passion fruit cuttings were studied, which could provide a theoretical basis for the scientific application of nitrogen and phosphorus fertilizer in its cultivation. The test under the condition of pot culture, six treatments were set including no fertilization control(T1), nitrogen and phosphorus were 4 g·plant−1 and 4 g·plant−1(conventional fertilization control, T2), 6 g·plant−1 and 4 g·plant−1(T3), 8 g·plant−1 and 4 g·plant−1(T4), 4 g·plant−1 and 6 g·plant−1(T5), 4 g·plant−1 and 8 g·plant−1(T6)respectively, and the changes of nitrogen and phosphorus uptake in organs of Passiflora edulis Sims. were studied. The results show that: compared with no fertilization, conventional fertilization could improve the nitrogen uptake of Passiflora edulis Sims.; at 100 days after treatment, there was no significant difference in root nitrogen uptake between T4 and T6, and the two treatments increased by 32.72% and 34.92% respectively compared with T2; the nitrogen uptake of T6 in stem increased by 63.84% respectively compared with T2; the nitrogen uptake of T4 in leaves increased by 21.33% compared with T2, and T4 was significantly higher than T6; compared with T2, the phosphorus uptake of roots, stems and leaves in T6 increased by 113.90%, 52.62% and 150.67% respectively; the phosphorus uptake in root and stem of T4 was significantly lower than T6, there was no significant difference between T4 and T6; the phosphorus uptake in leaves of T4 was significantly increased by 153.22% compared with T2; compared with T2, T6 and T4 decreased the proportion of nitrogen distribution in roots and leaves, and increased the proportion of nitrogen distribution in stems; compared with T2, T6 and T4 reduced the proportion of phosphorus distribution in roots and stems, and increased the proportion of phosphorus distribution in leaves. Comprehensive analysis showed that T6 and T4 was the suitable treatment to promote the uptake of nitrogen and phosphorus in Passiflora edulis Sims.

       

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