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Changes in Leaf and Growth of Pak Choi in a Semi-closed Greenhouse in Eastern China

文献类型： 外文期刊

作者： Ding, Xiaotao 1 ; Zhang, Hongmei 1 ; He, Lizhong 1 ; Jin, Haijun 1 ; Zhou, Qiang 1 ; Yang, Juan 1 ; Zhu, Weimin 1 ; Yu, Jizhu 1 ; Qian, Tingting 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Shanghai Key Lab Protected Hort Technol, Shanghai 201403, Peoples R China

2.Shanghai Dushi Green Engn Co Ltd, Shanghai 201106, Peoples R China

关键词： leaf; plant height; plant width; regression model

期刊名称：HORTSCIENCE （ 影响因子：1.874； 五年影响因子：1.921 ）

ISSN： 0018-5345

年卷期： 2022 年 57 卷 5 期

页码：

收录情况： SCI

摘要： To study and model changes in the development of pak choi (Brassica rapa ssp. chinensis Makino), three pak choi cultivars-Xinxiaqing No. 5 (Xinxiaqing 5), Haiqing, and Huawang-were grown in a modern greenhouse. Four structural parameters, including leaf length, leaf width, and plant height and width, were measured regularly every 3 days. The results showed that the changes in plant height and width, and leaf length and width of the three cultivars followed sigmoidal trends. Logistical regression models {Y= K/[1 + (K - L-0)/L-0 x exp(-r x t)] ; Y = K/[1 + (K - L-0)/L-0 x exp(- r x rad)]} of the leaf length and width accumulated with growth days and with accumulated radiation fit the actual data very well, with the correlation coefficient R-2 all greater than 0.98. The R-2 values of the plant width accumulation models were all greater than 0.93, whereas the R-2 values of the plant height regression models were not robust. In this study, the regression models of changes in plant height and width, and leaf length and width of pak choi were used to study the changes of morphological characteristics and analyze the change rules of pak choi growth and development.

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