不同栽培密度对‘津农香’新品系产量和生理指标的影响

doi:10.19640/j.cnki.jtau.2026.01.002

Journal of Tianjin Agricultural University ›› 2026, Vol. 33 ›› Issue (1): 6-13.doi: 10.19640/j.cnki.jtau.2026.01.002

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Effects of different cultivation densities on yield and physiological indexes of new strains of ‘Jinnongxiang’

Tian Yubing¹, Ji Xue¹, Han Yu¹, Wang Tao², Li Zhibin^{1,Corresponding Author}, Pei Zhongyou^{1,Corresponding Author}

1. Tianjin Key Laboratory of Intelligent Breeding for Major Crops, Tianjin Agricultural University, Tianjin 300392, China;
2. Zhonghe Future Agriculture Technology Development（Tianjin）Co., Ltd, Tianjin 301812, China

Received:2024-05-08 Online:2026-02-28 Published:2026-02-05

Abstract

Abstract: This study used nine new varieties of ‘Jinnongxiang’ rice and two main cultivated varieties as experimental materials, which were planted in the field. Three planting densities were set, namely high density（row spacing 30 cm, plant spacing 12 cm）, medium density（row spacing 30 cm, plant spacing 16 cm）, and low density（row spacing 30 cm, plant spacing 20 cm）. The changes in physiological indicators of each variety at key growth stages under different planting densities were detected. The differences among varieties were analyzed, and the changes in yield and its components of each variety were investigated. The results showed that:（1）In terms of yield components, plant height gradually increased with the increase of planting density; the longest panicle length occurred under medium density; the yields of medium and high densities were higher than that of low density, but there was no significant difference between high and medium densities; the seed setting rate and 1000-grain weight had a significant impact on yield;（2）In terms of physiological indicators, the activities of SOD and POD enzymes showed an increasing trend first and then a decreasing trend, and reached the highest level under medium density; the activity of CAT enzyme was the lowest under medium density and showed a decreasing trend first and then an increasing trend. Comprehensive analysis indicates that the medium density planting condition is more suitable for the new ‘Jinnongxiang’ japonica rice varieties.

Key words: japonica rice, planting density, yield, physiological index

CLC Number:

S359.1

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Effects of different cultivation densities on yield and physiological indexes of new strains of ‘Jinnongxiang’

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