Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (2): 321-325.DOI: 10.16178/j.issn.0528-9017.20250769

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Comparison of lodging resistance and yield traits among different japonica rice varieties at the maturity stage

WENG Fei(), WANG Yi, XU Naixia, LI Qingkui   

  1. Suzhou Polytechnic Institute of Agriculture,Suzhou 215008,Jiangsu
  • Received:2025-10-18 Online:2026-02-28 Published:2026-03-07

Abstract:

To investigate the differences in lodging resistance among japonica rice varieties in the Taihu Lake region and their relationship with yield components,four varieties—Nanjing 46,Huruan 1212,Ningxiangjing 9,and Yangnongjing 1218 were selected to compare their stem mechanical characteristics,internode morphology,plant height structure and yield composition at the mature stage under identical cultivation conditions. The results showed that the breaking strength and bending stress of Nanjing 46 and Ningxiangjing 9 were relatively high,indicating greater potential for resisting lodging. The stem diameter and wall thickness of Yangnongjing 1218 and Ningxiangjing 9 were larger,and the internode fullness was higher. The plant height and center of gravity height of Nanjing 46 and Ningxiangjing 9 were relatively low,showing better lodging resistance. Besides,the yield of Yangnongjing 1218 and Ningxiangjing 9 was relatively high. Although Yangnongjing 1218 showed favorable morphological traits,its tall plant architecture increased lodging risk. Overall,Nanjing 46 and Ningxiangjing 9 exhibited a desirable balance between lodging resistance and yield,suggesting their suitability as stable and lodging-resistant japonica rice varieties for cultivation in the Taihu Lake region.

Key words: japonica rice, morphology, lodging resistance, yield

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