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Response of Potato Tuber Number and Spatial Distribution to Plant Density in Different Growing Seasons in Southwest China

文献类型： 外文期刊

作者： Zheng, Shun-Lin 1 ; Wang, Liang-Jun 2 ; Wan, Nian-Xin 1 ; Zhong, Lei 1 ; Zhou, Shao-Meng 1 ; He, Wei 3 ; Yuan, Ji-Chao 1 ;

作者机构： 1.Sichuan Agr Univ, Agron, Chengdu, Peoples R China

2.Agr Bur Dongpo Cty, Agrotecn Stn, Meishan, Peoples R China

3.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu, Peoples R China

关键词： potato;growing season;plant density;tuber yield;spatial distribution;artificial neural network model

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2016 年 7 卷

页码：

收录情况： SCI

摘要： The aim of this study was to explore the effects of different density treatments on potato spatial distribution and yield in spring and fall. Plant density influenced yield and composition, horizontal, and vertical distribution distances between potato tubers, and spatial distribution position of tuber weights. The results indicated that: (1) Spring potato yield had a convex quadratic curve relationship with density, and the highest value was observed at 15.75 x 10(4) tubers per hectare. However, the yield of fall potatoes showed a linear relationship with plant density, and the highest value was observed at 18 x 10(4) tubers per hectare; (2) Density had a greater influence on the tuber weight of spring potatoes and fruit number of single fall potatoes; (3) The number of potato tubers in the longitudinal concentration exhibited a negative linear relationship with density, whereas the average vertical distribution distance of tubers exhibited a positive incremental hyperbolic relationship. For spring and fall potato tubers, the maximum distances were 8.4152 and 6.3316 cm, and the minimum distances 8.7666 and 6.9366 cm, respectively; and (4) Based on the artificial neural network model of the spatial distribution of tuber weight, density mainly affected the number and spatial distribution of tubers over 80 g. Tubers over 80 g were mainly distributed longitudinally (6-10 cm) and transversely (12-20 cm) within the high density treatment, and the transverse distribution scope and number of tubers over 80 g were reduced significantly. Spring potato tubers over 80 g grown at the lowest density were mainly distributed between 12 and 20 cm, whereas those at the highest density were primarily distributed between 10 and 15 cm.

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