Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (6): 1522-1528.DOI: 10.16178/j.issn.0528-9017.20250445

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Comprehensive evaluation of quality of Brasenia schreberi at different harvesting periods based on principal component analysis

WANG Jiamin1,2(), ZHANG Xu1,2, WU Mingjiang1,2, SU Laijin1,2()   

  1. 1.Sanyang Wetland Ecological Environment Research Institute,Wenzhou University,Wenzhou 325035,Zhejiang
    2.Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection,College of Life and Environmental Science,Wenzhou University,Wenzhou 325035,Zhejiang
  • Received:2025-06-23 Online:2026-06-11 Published:2026-06-12
  • Contact: SU Laijin

Abstract:

This study investigated the effects of different harvesting periods on the content of major components of Brasenia schreberi,employed principal component analysis to comprehensively evaluate its optimal quality period,providing a scientific basis for the processing,utilization,and sustainable development of Brasenia schreberi. The results showed that the water content of young leaves and old leaves of Brasenia schreberi was the highest,and the content in May was the highest,reaching 98.71% and 89.25%,respectively. The content of crude polysaccharide of young leaves and old leaves in June was the highest,reaching 108.9 and 93.6 g·kg-1,respectively. The protein content of young leaves and old leaves in May was the highest,which was 4.8 and 33.0 g·kg-1,respectively. The ash content of young leaves and old leaves in October was the highest,which was 1.3 and 17.0 g·kg-1,respectively. Among the three main minerals,calcium content was the highest. The calcium content of young leaves and old leaves in October was the highest,which was 213.9 and 2 997.6 mg·kg-1,respectively. The changes of chlorophyll and total carotenoid contents were similar. The chlorophyll and total carotenoid contents of young leaves in May were the highest,reaching 0.24 and 0.05 mg·g-1,respectively,and those of old leaves were 1.56 and 0.38 mg·g-1,respectively. The carbon content increased continuously from May to July,and reached the peak in July. The carbon content of young leaves and old leaves in July was 28.66% and 38.72%,respectively. The results of principal component analysis showed that the comprehensive quality of young leaves and old leaves in May was the best. During this period,Brasenia schreberi had sufficient water,rich protein and mineral content,and high freshness.

Key words: Brasenia schreberi, quality, main components, principal component analysis

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