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地形因素对景观格局的塑造受到关注,而土壤资源性因素对生活史性状的影响很少受到重视。本文首次研究了干热河谷麻疯树生长与生殖性状对土壤厚度的反应。结果如下:(1)土壤厚度对雌花数量、性比都存在明显影响,土壤厚度较大时,雌性适合度较高;(2)土壤厚度明显影响到营养性构件大小,土壤资源丰富样地营养性构件明显较大,分支能力较强;(3)土壤厚度较大时,果期构件的果实包装良好,生殖频率、果实数量、千粒重都明显大于土壤厚度较薄样地,而结籽率、败育率变化不明显;(4)土壤厚度较大时,个体高度较大,垂直空间资源利用相对充分,而冠幅和地径则容易受到密度效应制约;(5)土壤厚度较大时,果实及其组分性状都较大,种子产量潜力较大。结论表明:土壤环境资源充沛时,麻疯树雌性适合度明显,这种生殖潜力还与营养性构件和个体生长优势(或者构型)紧密相关;土壤环境资源对生殖潜力的调节是通过提高构型参数来实现的。本文对于认识土壤环境资源对基于种群的景观格局异质性和生活史性状型具有重要作用。在栽培和经营中需要重视深植与土壤调控。
The impact of topography on the landscape pattern has drawn much attention, while the impact of soil resource on life history traits has received little attention. This paper first studied the response of Jatropha curcas growth and reproductive traits to soil thickness in dry and hot valley. The results are as follows: (1) Soil thickness had significant effect on the female flower number and sex ratio. When the soil thickness was larger, the female fitness was higher. (2) Soil thickness significantly affected the size of vegetative components and soil nutrient (3) When the soil thickness is larger, the fruits of fruit-bearing components are well packed, and the frequency of reproduction, the number of fruit and the weight of 1000-grain are significantly larger than that of the soil. The seed yield, (4) When the soil thickness is larger, the individual height is larger and the vertical space resource utilization is relatively sufficient, while the crown width and the ground diameter are easily controlled by the density effect. (5) When the soil thickness is large, Fruit and its components are larger traits, seed yield greater potential. The conclusions are as follows: The female fitness of Jatropha curcas is very obvious when soil environment resources are plentiful, and this reproductive potential is also closely related to vegetative components and individual growth predominance (or configuration). The adjustment of soil environmental resources to reproductive potential is through the improvement of the structure Type parameters to achieve. This article plays an important role in recognizing the heterogeneity of landscape pattern and life history traits based on the knowledge of soil environmental resources. In the cultivation and management of the need to focus on planting and soil regulation.