Estimation of individual leaf area, fresh weight, and dry weight of hydroponically grown cucumbers (Cucumis sativus L.) using leaf length, width, and SPAD value
Estimation of individual leaf area, fresh weight, and dry weight of hydroponically grown cucumbers (Cucumis sativus L.) using leaf length, width, and SPAD value
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DOI：
10.1016/j.scienta.2006.12.028
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发表时间：
2007-02-16
影响因子：
4.3
通讯作者：
Son, Jung Eek
中科院分区：
文献类型：
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作者：
Cho, Young Yeol;Oh, Sungbong;Son, Jung Eek
非破坏性和数学化的建模方法对于植物生长估计是非常方便和有用的。为了预测黄瓜的单株叶面积、鲜重和干重，利用叶长、叶宽、SPAD值以及这些变量的不同组合建立了预测模型。比较了8个常用的生长模型回归方程的准确性和适应性。单株叶面积(LA)=-210.61+13.358W+0.5356LW(R2=0.980**)，鲜重(FW)=-2.72+0.0135LW+0.00022LWS(R2=0.956**)，干重(DW)=0.25-0.00102LS+0.000077LWS(R2=0.956**)，其中L为叶长，W为叶宽，S为SPAD值，LWS=LxWxS。为了验证模型的有效性，单株叶面积、鲜重和干重的估计值分别与实测值表现出很好的一致性。特别是通过使用SPAD值以及叶片长度和宽度来估计叶片干重具有更高的精确度。因此，本文提出的模型对黄瓜单株叶面积、鲜重和干重的估计具有较高的精度。(C)2006爱思唯尔B.V.保留所有权利。
Non-destructive and mathematical approaches of modeling can be very convenient and useful for plant growth estimation. To predict individual leaf area, fresh weight, and dry weight of a cucumber (Cucumis sativus L.), models were developed using leaf length, leaf width, SPAD value, and different combinations of these variables. Eight regression equations, commonly used for developing growth models, were compared for accuracy and adaptability. The three nonlinear models developed were as follows: individual leaf area (LA)=-210.61+13.358W+0.5356LW (R-2=0.980***), fresh weight (FW)=-2.72+0.0135LW+0.00022LWS (R-2=0.956**), and dry weight (DW)=0.25-0.00102LS+ 0.000077LWS (R-2=0.956***), where L is the leaf length, W the leaf width, S the SPAD value, and LWS=LxWxS. For validation of the model, estimated values for individual leaf area, fresh weight, and dry weight showed strong agreement with the measured values, respectively. Leaf dry weight, especially, was estimated with a higher degree of accuracy through the use of a SPAD value, as well as leaf length and width. Therefore, it is concluded that models presented herein may be useful for the estimation of the individual leaf area, fresh weight, and dry weight of a cucumber with a high degree of accuracy. (c) 2006 Elsevier B.V. All rights reserved.