Studies of the Distribution of Mineral Elements with Different Substrate Treatments of Paeonia Suffruticosa in Pot
|School||Henan Agricultural University|
|Course||Ornamental Plants and Horticulture|
|Keywords||Paeonia suffruticosa substrate potted cultivation mineral elements annual period|
In this experiment, we took peony, a special flower in Henan, as materials. Corn straw was taken as the main substrate, vermiculite, slag and other waste materials as the assistant substrate. The purposes of this research are to elucidate the mechanism of mineral element distribution and migration and to determine the botany traits. The main results are as follows:1. The plant height and length and width of leaves in○7 treatment were maintained at high levels, significantly higher than the control, so○7 treatment (corn stalk matrix: vermiculite: slag = 3:1:2) is more suitable for the growth of potted peony.2. Mineral elements contents of potted Paeonia suffruticosa would have a uniform tendency in different matrix combination. In germination stage, mineral substances were rich in mixed bud. N、P、Cu contents decreased gradually ;K contents increased after a sharp decrease,and then decreased again after florescence, minimum was 0.801%;Mg contents increased gradually, but decreased slightly in leaf abscission; while Zn were the opposite and were lowest in florescence, its minimum was 24.583 mg/kg .In new stems, annual changes trends of N and Mg were same. After florescence, N、Mg contents decreased after a sharp increase, lowest in floral bud differentiation and had a sharp increase in leaf abscission, their minimum were 0.761% and 0.465% respectively; P、Cu contents decreased gradually, their minimum were 0.324% and4.128mg/kg respectively, while Fe were the opposite ; Ca、K contents had a sharp increase after a decrease in leaf unfolding. Mn and Mg contents had a uptrend, but decreased slightly in florescence.N、P contents in old stems were on the rise and then decreased after leaf unfolding, their maximum were 2.277% and 1.444% respectively; K、Mg contents had a slight increase after a sharp decrease, their maximum were 2.801% and 0.763% respectively; Ca content changed little; Fe content had a uptrend and was significantly higher than other mineral elements; Mn content increased gradually and changed little after leaf unfolding; Zn content reached a maximum and then dropped down in leaf abscission; Cu content reached a peak at florescence, its maximum was 69.608mg/kg.In roots, N and P contents were on the rise and then decreased. Ca and Mg contents increased and then decreased again after florescence; K content had a sharp increase after a gradual decease and then deceased slightly again in leaf abscission, its minimum was 0.085% in flowering period; Fe, a high minor-element, content was a steady uptrend, punctuated by shallow declines, its maximum was 558.004 mg/kg. Zn and Fe contents had the opposite tendency; Mn and Cu contents had a uniform tendency, increased at the stage from germination to leaf unfolding and then decreased after leaf unfolding.3. N、P、Fe、Mn and Cu were rich in mixed bud ,however, K, Ca, Mg and Zn in stem. The results indicated that, N, P and Mn were mainly distributed in leaves, K、Ca and Cu in new stem, Mg and Fe in old stem, and Zn in root in leaf unfolding period. In florescence, N、P、K、Mg and Mn were mainly found in leaves and new stem, Ca in roots, and Fe、Zn and Cu in old stem. The concentration of mineral element in new stems was lower than that of old stem. In floral bud differentiation, N、K and Mn were rich in leaves ,P in old stems and roots, Cu、Ca、Fe and Zn in old stems.However N、Zn、Cu in leaves, P in roots, K in new stem and Ca、Mg、Fe、Mn in old stems were high in leaf abscission. At same time, most elements contents increased slightly in new stems, old stems and roots.4. Rapid available phosphorus content decreased gradually in the stage of leaf unfolding period, increased gradually in floral bud differentiation and then decreased slightly in leaf abscission, its minimum was 4.576% in Dafengling stage and maximum was 10.286% in flower differentiation stage. Rapid available K decreased gradually in the stage of germination to flower bud differentiation, its minimum was 4.441% in leaf fall stage. There were significant negative correlation among P content in substrate at flowering and differentiation period and that of in abscission leaves. A positive relation was detected between K content in substrate at flowering period and that of in the leaf in floral bud differentiation. There was no significant correlation at other periods. So it’s better to fertilize phosphorus before the flowering and potash in flowering period.5. The rules of elements distribution and migration through the whole growth stage of potted peony were consistent with that of traditional field peony. So we should not only fertilize dormancy, sustaining and spikelet-promoting fertilizer, but also spray available nutrient and compound fertilizer.