Effects of Fertilizer Reduction Combined with Organic Fertilizer on Nitrogen Metabolism and Formation of Yield and Quality of Flue-cured Tobacco

doi:10.11923/j.issn.2095-4050.cjas2024-0026

Abstract

Abstract:

To explore the role of organic fertilizer application in the growth and nitrogen metabolism of flue-cured tobacco under the condition of chemical fertilizer reduction, the field experiment was conducted. Using flue-cured tobacco variety ‘Yunyan 87’ as the test material, five treatments were set up, including conventional fertilization (CK), chemical fertilizer reduction of 10% (T1), chemical fertilizer reduction of 10% + sesame cake (T2), chemical fertilizer reduction of 10% + humic acid (T3), chemical fertilizer reduction of 10% + sesame cake + humic acid (T4), to study the effects of fertilizer reduction combined with different organic fertilizers on the agronomic traits, dry matter accumulation, nitrogen metabolism related indicators, chemical composition and economic traits of flue-cured tobacco. The results showed that the reduction of chemical fertilizer reduced the agronomic traits and dry matter accumulation of tobacco plants. Compared with the chemical fertilizer reduction treatment, the plant height increased by 2.18%-5.28%, the stem circumference increased by 5.84%-9.06%, and the dry matter accumulation increased by 26.80%-39.88% in the organic fertilizer application treatments, respectively. Combined application of organic fertilizer had a certain effect on nitrogen metabolism, increased SPAD value, protein content, and the activities of asparagine synthetase, glutamic oxaloacetate aminotransferase and alanine aminotransferase to varying degrees. The combined application of organic fertilizer increased the yield and output value by 6.32%-14.57% and 3.35%-14.55%, respectively, compared with the chemical fertilizer reduction treatment, and also increased by 2.61%-10.58% and 2.79%-13.93% compared with CK; compared with the chemical fertilizer reduction treatment, the partial productivity of nitrogen fertilizer and the partial production efficiency of nitrogen fertilizer increased by 6.32%-14.57% and 3.35%-14.55%, respectively, and also increased by 14.01%-22.86% and 14.21%-26.59% compared with CK. The combined application of organic fertilizer has a certain alleviating effect on the decrease of nicotine, total nitrogen and potassium content, and the increase of sugar content and sugar-alkali ratio caused by chemical fertilizer reduction, and the chemical composition and coordination index are closer to the suitable range of high-quality tobacco leaves. In terms of comprehensive effect, sesame cake fertilizer is the best.

Key words: flue-cured tobacco, fertilizer reduction, organic fertilizer, nitrogen metabolism, production quality, benefit of nitrogen fertilizer

YANG Zhen, ZHONG Guoxing, LI Huaiyuan, HU Huan, LIANG Yaoxing, LEI Wenjie, HUANG Ruiyin, DENG Shiyuan. Effects of Fertilizer Reduction Combined with Organic Fertilizer on Nitrogen Metabolism and Formation of Yield and Quality of Flue-cured Tobacco[J]. Journal of Agriculture, 2025, 15(10): 45-52.

Figures/Tables 8

References 33

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处理	N	P₂O₅	K₂O	芝麻饼肥	腐殖酸肥
CK	147	142	483	0	0
T1	132.3	127.8	434.7	0	0
T2	132.3	127.8	434.7	600.0	0
T3	132.3	127.8	434.7	0	450.0
T4	132.3	127.8	434.7	600.0	450.0

处理	N	P₂O₅	K₂O	芝麻饼肥	腐殖酸肥
CK	147	142	483	0	0
T1	132.3	127.8	434.7	0	0
T2	132.3	127.8	434.7	600.0	0
T3	132.3	127.8	434.7	0	450.0
T4	132.3	127.8	434.7	600.0	450.0

处理	株高/cm	茎围/cm	叶片数	最大叶叶面积/cm²
CK	98.67±1.19a	10.80±0.30ab	17.00±0.00a	1809.71±203.74a
T1	94.67±1.33b	10.27±0.64b	15.00±1.00c	1540.68±212.43b
T2	97.97±9.38a	10.87±1.37ab	17.00±1.00a	1795.26±119.01a
T3	96.73±4.25a	11.20±0.46a	16.67±0.58ab	1681.17±135.69ab
T4	99.67±6.04a	10.93±0.51a	16.00±1.00b	1855.94±88.49a

处理	株高/cm	茎围/cm	叶片数	最大叶叶面积/cm²
CK	98.67±1.19a	10.80±0.30ab	17.00±0.00a	1809.71±203.74a
T1	94.67±1.33b	10.27±0.64b	15.00±1.00c	1540.68±212.43b
T2	97.97±9.38a	10.87±1.37ab	17.00±1.00a	1795.26±119.01a
T3	96.73±4.25a	11.20±0.46a	16.67±0.58ab	1681.17±135.69ab
T4	99.67±6.04a	10.93±0.51a	16.00±1.00b	1855.94±88.49a

处理	移栽后天数/d
处理	45	70	95
CK	39.91±1.24a	48.98±0.92a	23.15±1.20c
T1	36.64±0.26b	42.51±3.51c	22.09±1.62c
T2	38.86±0.17a	45.37±2.82b	30.32±1.77a
T3	37.31±1.49b	43.16±1.15c	23.62±0.58c
T4	40.58±2.45a	47.17±1.79a	26.02±2.28ab