Effect of planting density and phosphorus fertiliser on seed yield of Melilotus officinalis

doi:10.11686/cyxb2017305

Abstract

Abstract: Efficient seed production technology provides the main foundation for ensuring the successful extension of elite cultivars. Field trials were conducted on the Hexi Corridor, Gansu Province, from 2014 to 2016 to determine the effects of different within-row spacing (30, 45, 60 cm) and phosphorus fertiliser application rates (0, 40, 80 and 120 kg·ha^-1 P₂O₅) on seed yield and yield components of two Melilotus officinalis cultivars, Tianshui and Norgold. Seed yield was affected significantly (P<0.01) by within-row spacing, fertilizer rate and their interactions. The 60 cm within-row spacing and fertilizer rate of 80 kg·ha^-1 P₂O₅ produced the highest mean seed yield over 2 years in Tianshui; 1234 kg·ha^-1. The highest seed yields in Norgold were produced by 80 P₂O₅ kg·ha^-1 and 45 cm within-row spacing resulting in seed yields of 1613 and 1428 kg·ha^-1 in 2015 and 2016, respectively. Path coefficient analysis indicated that, among the seed yield components, the number of fertile shoots had the greatest influence on seed yield.

Key words: Melilotus officinalis, within-row spacing, phosphorus fertilizer rates, seed yields, path coefficient analysis

LUO Kai, ZHANG Ji-yu, WANG Yan-rong. Effect of planting density and phosphorus fertiliser on seed yield of Melilotus officinalis[J]. Acta Prataculturae Sinica, 2018, 27(7): 112-119.

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