指数施肥对云曼红豆杉幼苗活性成分10DAB及养分累积的影响
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中央财政林业科技推广示范项目([2019]10号);


Effect of Exponential Fertilization on Active Component 10DAB and Nutrient Accumulation of Taxus madia × Taxus yunnanensis ‘Yunman’ Seedlings
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    摘要:

    以1年生云曼红豆杉实生容器苗为材料,设置不施肥对照(CK)以及不同施肥量的平均施肥(AF1、AF2)、指数施肥(EF1、EF2、EF3和EF4)等7个处理,测定不同施肥方式和施肥量下苗木各时期活性成分10DAB含量、生长量、枝叶生物量和10DAB累积量,以及各部位N、P和K养分累积情况,探究施肥方式及施肥量对云曼红豆杉幼苗活性成分10DAB及养分累积的影响,为云曼红豆杉苗期养分精准调控与高效培育提供理论和实践依据。结果表明:(1)施肥显著提高了幼苗枝叶中10DAB含量,促进了生长及枝叶生物量累积(P<0.05);在相同施氮量下,指数施肥处理枝叶生物量显著大于平均施肥(P<0.05),枝叶中10DAB含量以EF2、EF3处理较高,生长和枝叶生物量以EF2处理最大。(2)EF2处理的枝叶10DAB累积量显著大于其他处理(P<0.05),并表现为:EF2 >EF1 > AF2 > EF3 > AF1> EF4 > CK,EF2处理分别较AF1和AF2处理提高30.61%~41.94%和18.14%~25.00%。(3)施肥对幼苗各部位N、P和K含量的影响显著(P<0.05);在相同施氮量下,指数施肥各部位的N、P和K含量均优于平均施肥;指数施肥处理中,根系中的N含量以及各器官K含量随施肥量增加而上升,各部位P含量以及茎和叶中N含量随施肥量增加先上升后下降;各处理N、P和K分配比例呈现出叶> 根> 茎规律。幼苗各器官中N与P、P与K以及根、叶中的N与K之间均表现出显著(P<0.05)正相关,呈现出协同关系。(4)云曼红豆杉幼苗的10DAB累积量在9~10月份最高,此时采收可获得的10DAB累积量最高,收益也最大。研究发现,指数施肥与平均施肥相比有效提高了云曼红豆杉苗木活性成分10DAB及养分累积,并以施肥量为1 600 mg·株-1的苗木各指标表现较优。

    Abstract:

    Seven treatments including control (CK), average fertilization (AF1, AF2), exponential fertilization (EF1, EF2, EF3 and EF4) were applied to the oneyearold container seedlings of Taxus madia × T. yunnanensis ‘Yunman’(YM). The active component 10DAB, growth, shoot biomass and 10DAB accumulation, as well as the N, P and K accumulation in different organs were measured under different fertilization methods and rates. The effects of different fertilization methods and fertilization amounts on 10DAB and nutrient accumulation of YM seedlings were studied. The results provide a theoretical and practical basis for precise regulation of nutrients and efficient cultivation of YM in seedling stage. The results showed that: (1) fertilization significantly increased the content of 10DAB in the branches and leaves of seedlings and promoted the growth and biomass accumulation of branches and leaves (P<0.05). Under the same nitrogen application rate, the branch and leaf biomass of exponential fertilization was significantly higher than that of average fertilization (P<0.05). The content of 10DAB in branches and leaves was higher in EF2 and EF3 treatments, and the growth and branch and leaf biomass were the largest in EF2 treatment. (2) The accumulation of 10DAB in exponential fertilization EF2 treatment was significantly higher than that in other treatments (P<0.05). The order was EF2 > EF1 > AF2 > EF3 > AF1 > EF4 > CK. Exponential fertilization EF2 was 30.61%-41.94% higher than average fertilization AF1 and 18.14%-25.00% higher than average fertilization AF2. (3) The effects of fertilization on the contents of N, P and K in all parts of seedlings reached a significant level (P<0.05). Under the same nitrogen application rate, the contents of N, P and K in each part of exponential fertilization were better than that of average fertilization. In exponential fertilization, the N content in roots and K content in each part increased with the increase of fertilization, while the N content in stems and leaves and P content in all parts, first increased and then decreased with the increase of fertilization. The distribution ratio of N, P and K showed the rule of leaf > root > stem. N and P, P and K in all parts of seedlings and N and K in roots and leaves showed significant (P<0.05) positive correlation, which was a synergistic relationship. (4) The accumulation of 10DAB in YM is the highest from September to October. At this time, the accumulation of 10DAB available for harvesting is the highest and the income is the largest. The study found that compared with conventional fertilization, exponential fertilization could increase the contents of 10DAB and the accumulation of nutrients in YM seedlings, and the amount of fertilizer applied was 1 600 mg·plant-1.

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孙志鹏,王 刚,武华卫,等.指数施肥对云曼红豆杉幼苗活性成分10DAB及养分累积的影响[J].西北植物学报,2022,42(9):1561-1569

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  • 在线发布日期: 2024-12-03
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