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香樟对邻体植物具有化感作用,为获得良好的园林绿化配置效果、促进科学的林地管理,采用盆栽试验探讨香樟凋落叶分解对牵牛花生长和生殖的影响,以及施氮对凋落叶分解效应的影响.试验设置对照(CK)和25 g/盆(L25)、50 g/盆(L50)、100 g/盆(L100)3个水平凋落叶处理,凋落叶分解34 d后开始施氮处理(0.39 g尿素/盆,分3次施入).结果表明:(1)凋落叶分解明显抑制了牵牛花株高、基径、叶面积和生物量的积累,其中,株高降低32.85%-83.78%,茎粗减小5.23%-23.00%,叶面积减小30.31%-58.47%,生物量降低40.34%-84.54%,且剂量越大作用越强越持久,而施氮能明显减轻牵牛花生长受抑制的现象.(2)各水平凋落叶处理后,牵牛花始花期延迟2.5-10.0 d,开花持续时间延长6.3-11.4 d,开花数量增加0.5-3.3朵,但花朵品质较之对照降低,且牵牛花种子百粒重随着凋落叶添加量的增加而减小;施氮后,上述指标在各剂量凋落叶处理间的差异很小或无差异.综合各项指标可见,香樟凋落叶分解会对牵牛花生长发育产生明显的抑制效应,这可能与香樟凋落叶分解释放有毒物质作用于牵牛花有关.
Cinnamomum camphora has the allelopathy on the neighboring plants. In order to obtain good landscaping allocation and promote the scientific forest management, the pot experiment was conducted to investigate the effects of decomposition of camphor leaf on the growth and reproduction of morning glory, (CK) and litter of 25 g / pot (L25), 50 g / pot (L50) and 100 g / pot (L100) The results showed that: (1) litter decomposition significantly inhibited the accumulation of plant height, basal diameter, leaf area and biomass of morningglory, in which the plant height Decreased 32.85% -83.78%, reduced stem diameter by 5.23% -23.00%, decreased leaf area by 30.31% -58.47% and decreased biomass by 40.34% -84.54% (2) The flowering stage of morning glory delayed 2.5-10.0 d after each level litter treatment, the duration of flowering extended 6.3-11.4 d, and the number of flowering increased 0.5-3.3, however, Compared with the control, the quality of the flowers decreased, and the weight of the morning glory seeds decreased with the increase of the amount of litter leaves. After application of nitrogen, Leaf treatment differences between the small or no difference.According to the various indicators can be seen, decomposition of camphor leaf litter will have a significant inhibitory effect on the growth and development of morning glory, which may be the decomposition of camphor leaf litter decomposition of toxic substances act on the cows Flower related.