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温室网纹甜瓜叶面积与光合生产模拟模型研究

DOI: 10.7685/j.issn.1000-2030.2006.01.002, PP. 7-12

Keywords: 叶面积指数,光合生产,干物质积累,模拟模型

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Abstract:

依据温室温光条件与甜瓜单株叶面积的关系,建立了甜瓜叶面积指数(LAI)模型,结合已有的光合作用驱动的作物生长模型,建立了适合我国种植技术的甜瓜光合作用与干物质积累动态模型。利用不同基质、品种和播期的试验资料对模型进行了检验。结果表明,本模型较用比叶面积和叶干重的SLA法及用积温与叶面积的函数的GDD法更能准确地模拟温室甜瓜的LAI和植株总干重。LAI的模拟值与实测值之间的决定系数(R2)和回归估计标准误(RMSE)分别为0.867和0.404,植株总干重的模拟值与实测值之间的R2和RMSE分别为0.887和645kg.hm-2。用本模型模拟LAI的精度分别比SLA法和GDD法提高78%和40%;模拟植株总干重的精度分别比SLA法和GDD法提高57%和36%。本模型不仅改善了甜瓜叶面积和干物质生产的模拟精度,而且提高了模型的实用性。

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