日光温室黄瓜叶片和果实相关参数的模拟

为建立黄瓜叶面积和果实干鲜重的模拟模型,采用定株非破坏性观测和随机取样方法,系统观测了日光温室内黄瓜不同播期整个生育期的叶长、叶宽、叶面积及果长、果径、果实体积和干鲜重.运用几何解析方法,建立了与黄瓜叶片特征相适应的叶面积模拟模型,其结果对实测值有很好的拟合性;比叶重模拟结果表明,叶片比叶重随叶面积的增加趋于减小,在叶片充分展开后其值稳定在0.31 mg*cm2左右;以黄瓜果长、果径为参数建立的果实体积和鲜重模拟模型的结果与实际值相当一致,相关系数达R2=0.996;果实干物质含量的模拟结果受采收期果实含水量的影响较大.所建模型与待建的黄瓜光合作用模拟模型相联接,可实现对黄瓜群体结构和果实产量的预测,是日光温室黄瓜生长发育系统模型的子模型之一.

Simulation of related parameters of cucumber leaf and fruit in sunlight greenhouse

In order to establish the simulation models of cucumber leaf area and fruit weight, some non-destructive and random sampling methods were used to measure the length, width and area of the leaves and the length, circumference, volume and fresh and dry weight of the fruit with different seeding times in sunlight greenhouse. With geometry analysis method, a method with clear physical meaning was established for simulation. The simulated results were fitted very well with the measured values. The simulated ratio of cucumber leaf dry matter to leaf area tended to reduce with increasing the leaf area, and stabilized around 0.31 mg/cm2. Using the parameters of length and circumference of fruit, the simulation model of fresh weight of the fruit provided an accurate estimation of the fresh weight and volume when the leaf was fully expended. The correlation coefficient(r) was 0.996. The simulated dry matter content was great influenced by the fruit water content during the maturity period. Furthermore, connected with the simulation model of photosynthesis, the model could forecast the cucumber canopy architecture and fruit output.