The Effect of Different Planting Densities on Lodging-resistant Properties and Yield of Quinoa

doi:10.7668/hbnxb.20191823

Abstract

Abstract: To determine the suitable planting density of quinoa population with high lodging resistance and high yield, the agronomic characters, stem mechanical characteristics, physiological indices and relations between lodging percentage and yield components of different quinoa cultivars under different planting densities were studied systematically by setting two factors of cultivar and density in field trials. The main conclusions were as followed. The lodging of two quinoa varieties occurred at the filling stage and maturity stage, and the lodging rate increased significantly with the increase of planting density. The lodging rate of LL-1 was significantly lower than that of K2. Stem diameter, number of main stem branching, leaf area per plant, stem dry weight, spike dry weight, unit stem length dry weight, stem cellulose and lignin content, the stem break strength, crushing strength, and puncture strength and grain weight per plant decreased with the increase of planting density. The plant height and yield increased first and then decreased with the increase of planting density. There is no significant difference in the 1 000 grains weight between different density treatments. Except for the plant height and yield, the other indexes were significantly negatively correlated with the lodging rate. The suitable planting densities of LL-1 and K2 achieving maximum economic yield were respectively 15.9×10⁴, 14.1×10⁴ plants/ha in Yinshan Hilly Region of Inner Mongolia.

Key words: Quinoa, Lodging resistance, Planting density, Yield

CLC Number:

S519

ZHANG Yongping, PAN Jianan, GUO Zhanbin, WU Qiang, BAI Yu. The Effect of Different Planting Densities on Lodging-resistant Properties and Yield of Quinoa[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(4): 108-115. doi: 10.7668/hbnxb.20191823.

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