Effects of rapeseed cake fertilizers with different fat contents on tobacco leaf oil content and quality

doi:10.14088/j.cnki.issn0439-8114.2026.04.013

Abstract

Abstract: To investigate the effects of rapeseed cake fertilizers with different fat contents on the oil content and quality of tobacco leaves, a field experiment was conducted using the cultivar Yunyan 87. Treatments included conventional fertilization (CF) and combined applications of rapeseed cake fertilizers with low (LFB), medium (MFB), and high (HFB) fat contents. Photosynthetic pigment contents, glandular trichome density, and petroleum ether extract content in tobacco leaves were measured at the topping and mature stages. The cembrenediol content and the relative content of higher fatty acids in cured tobacco leaves were also analyzed to comprehensively evaluate their economic value. The results showed that compared with CF, the rapeseed cake fertilizer treatments (LFB, MFB, HFB) increased the photosynthetic pigment contents in tobacco leaves. Among these, the high fat-content rapeseed cake fertilizer treatment resulted in the highest photosynthetic pigment content at the topping stage, but its content was lower than that of the low fat-content rapeseed cake fertilizer and medium fat-content rapeseed cake fertilizer treatments at the mature stage. The medium fat-content rapeseed cake fertilizer increased the glandular trichome density in middle and lower tobacco leaves, enhanced the petroleum ether extract content in upper leaves, and elevated the cembrenediol content and the relative contents of saturated fatty acids (myristic acid, palmitic acid, and stearic acid) in cured middle leaves. This led to improved sensory quality and increased proportions of high-grade tobacco leaves and average price. The high fat-content rapeseed cake fertilizer increased the glandular trichome density in upper leaves, boosted the petroleum ether extract content in middle leaves at the topping stage and the cembrenediol content in cured tobacco leaves, and enhanced the yield and output value of tobacco leaves. In conclusion, the application of medium fat-content rapeseed cake fertilizer and high fat-content rapeseed cake fertilizer was a feasible organic fertilization strategy for achieving high-quality production of tobacco leaves and substituting conventional chemical fertilizers.

Key words: fat content, rapeseed cake fertilizer, tobacco leaf, oil content, quality, organic fertilizer

CLC Number:

S572
S141.5

CHEN Ling-ting, XU Sheng-kai, YANG Yan-hua, SUN Guang-wei, FENG Ji, YIN Gang-hua, CHEN Zhen-guo, DENG Jian-qiang, SI Guo-han. Effects of rapeseed cake fertilizers with different fat contents on tobacco leaf oil content and quality[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(4): 75-80.

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