河套灌区玉米适宜种植密度及其高产栽培品种研究

doi:10.12190/j.issn.2096-1197.2024.03.03

Abstract

Abstract: 【Objective】To screen the suitable maize planting density and varieties in Hetao irrigation district of Inner Mongolia,and provide reference for the improvement of maize yield per unit area based on this.【Methods】The experiment was carried out in Bayannur City,Inner Mongolia from 2022 to 2023. A two-factor randomized block design was adopted,and the main treatment was plant density（D1：90 000 plants/hm²,D2：97 500 plants/hm²,D3：105 000 plants/hm²,D4：112 500 plants/hm²,D5：120 000 plants/hm²）,and varieties were sub-treated（Sitai 112,Lilong 170,Mingyu 268,Jinyuan 118）. The effects of different densities on agronomic traits,yield components and yield of each maize variety were analyzed,and their economic benefits were calculated.【Results】At 5 densities,the reproductive growth of Sitai 112 was 3 days earlier than that of other varieties. At D3 density,Mingyu 268 plant height and ear height both were the highest,which were 3.18 and 1.33 cm,respectively. At D5 density,the lodging rate and hollow bar ratio of Mingyu 268 both were the highest,which were 30.40% and 14.21%,respectively. With the increase of density,the ear length of each variety gradually decreased and the values of Sitai 112,Lilong 170,Mingyu 268 and Jinyuan 118 reached the maximum at the density of D1,which were 20.10,21.55,18.75 and 20.85 cm,and there was no significant difference in ear diameter among varieties（P>0.05）. At the density of D1 and D2,the yield and net income of Sitai 112 were highest,which were 14.68,15.01 t/hm² and 27 394,28 017 yuan/hm². At the density of D3 and D4,the yield and net income of Lilong 170 were highest,which were 17.09,17.00 t/hm² and 32 504,32 206 yuan/hm². At the density of D5,the yield and net income of Jinyuan 118 were highest,which were 13.13 t/hm² and 23 585 yuan/hm².【Conclusion】In Hetao irrigation district of Inner Mongolia,the high-yield cultivated varieties were Sitai 112 at 90 000 and 97 500 plants/hm²,Lilong 170 at 105 000 and 112 500 plants/hm²,and Jinyuan 118 at 120 000 plants/hm².

Key words: Maize, Planting density, Variety, Agronomic traits, Yield, Economic benefits

CLC Number:

S513

LIU Siqi, HE Zhongping, BAO Junwei, FAN Xiurong, GAO Haiyan, ZHANG Yan, ZHANG Hongping, DAI Cheng, SUN Xiuyun, ZHAO Xiaoyu. Study on the suitable planting density and high-yield cultivated varieties of maize in Hetao irrigation district[J].Journal of Northern Agriculture, 2024, 52(3): 29-37.

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Study on the suitable planting density and high-yield cultivated varieties of maize in Hetao irrigation district

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