Zheng Shun-Lin, Wang Liang-Jun, Wan Nian-Xin, Zhong Lei, Zhou Shao-Meng, He Wei, Yuan Ji-Chao
Agronomy, Sichuan Agricultural University Chengdu, China.
Agriculture Bureau of Dongpo County, Agrotechnical Station Meishan, China.
Front Plant Sci. 2016 Apr 8;7:365. doi: 10.3389/fpls.2016.00365. eCollection 2016.
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 × 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 × 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.
本研究的目的是探讨不同密度处理对春、秋季马铃薯空间分布和产量的影响。种植密度影响产量、组成、马铃薯块茎之间的水平和垂直分布距离以及块茎重量的空间分布位置。结果表明：（1）春马铃薯产量与密度呈凸二次曲线关系，在每公顷15.75×10⁴株时产量最高。然而，秋马铃薯产量与种植密度呈线性关系，在每公顷18×10⁴株时产量最高；（2）密度对春马铃薯块茎重量和单个秋马铃薯果实数量影响较大；（3）纵向集中的马铃薯块茎数量与密度呈负线性关系，而块茎的平均垂直分布距离呈正增量双曲线关系。春、秋季马铃薯块茎的最大距离分别为8.4152厘米和6.3316厘米，最小距离分别为8.7666厘米和6.9366厘米；（4）基于块茎重量空间分布的人工神经网络模型，密度主要影响80克以上块茎的数量和空间分布。在高密度处理下，80克以上的块茎主要纵向（6 - 10厘米）和横向（12 - 20厘米）分布，80克以上块茎的横向分布范围和数量显著减少。最低密度种植的春马铃薯80克以上块茎主要分布在12至20厘米之间，而最高密度种植的则主要分布在10至15厘米之间。
