Effects of Combined Application of Biological Organic Fertilizer and Nitrogen Fertilizer on the Quality Traits of Dalixiang and Its Relationship with Panicle Type Index
1st author: gongyanlong1208@163.com
Received date: 2025-08-13
Online published: 2026-01-13
To explore the influence of different ratios of organic fertilizer to nitrogen fertilizer on the quality traits and panicle type index of high-quality conventional rice variety Dalixiang, and to clarify the relationship between quality traits and panicle type index(PTI), a field experiment was conducted using Dalixiang as the test material. The experiment included 6 treatments: no fertilization (CK), normal application of nitrogen fertilizer(N), 30% replacement of nitrogen fertilizer with biological organic fertilizer(NF1), 50% replacement of nitrogen fertilizer with biological organic fertilizer(NF2), 70% replacement of nitrogen fertilizer with biological organic fertilizer (NF3), and 100% application of organic fertilizer (F). The research results showed that the combined application of biological organic fertilizer and nitrogen fertilizer significantly influenced rice quality, with a reasonable ratio greatly improving processing, appearance and nutritional quality of rice, as well as significantly increasing protein components and amino acid content in rice. The NF1 treatment exhibited the highest brown rice rate, milled rice rate and head rice rate along with the lowest chalkiness degree; its protein content was lower than that of the N treatment but higher than that of other treatments. The NF3 treatment resulted in higher peak viscosity, hot paste viscosity and cold gel viscosity, along with the lowest setback value, significantly optimizing the starch RVA profile characteristics values. According to the results of principal component analysis, the influence of combined application of biological organic fertilizer and nitrogen fertilizer on the quality of Dalixiang could be characterized by the first three principal components, with a cumulative variance contribution rate of 85.10%. Combined with the analysis of the factor score coefficient matrix, five indicators namely arginine, phenylalanine, threonine, milled rice albumin and brown rice albumin, were determined as the key factors for evaluating the quality of rice after the combined application of organic fertilizer and nitrogen fertilizer. In addition, different treatments were divided into three categories through cluster analysis: Category Ⅰincluded NF2, NF3 and N, with the best comprehensive quality; Category Ⅱincluded CK and NF1, with medium comprehensive quality; Category Ⅲ only contained F, with the worst comprehensive quality. Correlation analysis showed that there was a significant positive correlation (P<0.05) between the panicle type index and brown rice rate, milled rice rate and head rice rate.
GONG Yanlong, LEI Yue, WANG Zhongni, ZHU Susong . Effects of Combined Application of Biological Organic Fertilizer and Nitrogen Fertilizer on the Quality Traits of Dalixiang and Its Relationship with Panicle Type Index[J]. China Rice, 2026 , 32(1) : 55 -63 . DOI: 10.3969/j.issn.1006-8082.2026.01.010
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