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The impact of humic acid compound fertilizer on sweet potato variety Jishu 25: A comprehensive study on dry matter, root yield, and starch properties

文献类型： 外文期刊

作者： Duan, Wenxue 1 ; Li, Guanghua 4 ; Zhang, Haiyan 1 ; Wang, Qingmei 1 ; Xie, Beitao 1 ; Zhang, Liming 2 ;

作者机构： 1.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R China

2.Minist Agr & Rural Affairs, Sci Observat & Expt Stn Tuber & Root Crops Huang H, Jinan 250100, Peoples R China

3.Featured Crops Engn Lab Shandong Prov, Jinan 250100, Peoples R China

4.Sishui Lifeng Food Co Ltd, Jining 273200, Peoples R China

5.Shandong Acad Agr Sci, Jinan 250100, Peoples R China

6.Shandong Acad Agr Sci, Crop Res Inst, 202 Gongyebei Rd, Jinan 250100, Shandong, Peoples R China

7.Shandong Acad Agr Sci, 202 Gongyebei Rd, Jinan 250100, Shandong, Peoples R China

关键词： Humic acid compound fertilizer; Storage root yield; Starch yield; Starch -synthesis enzymes; Starch properties

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.3； 五年影响因子：4.5 ）

ISSN： 0304-4238

年卷期： 2024 年 327 卷

页码：

收录情况： SCI

摘要： In recent years, although humic acid (HA) compound fertilizers have been applied in sweet potato production, limited research has specifically addressed their impacts on dry matter (DM) accumulation, starch yield and starch properties, particularly in varieties with high starch content. To assess these effects, five treatments were designed for the high-starch variety Jishu 25 as follows: no fertilizer application (CK), chemical fertilizer with 75-60-180 kg ha  1 N-P2O5-K2O (F1), 750 kg ha  1 HA compound fertilizer with 2.6 % HA and 10-8-24 N-P2O5K2O (F2), chemical fertilizer with 112.5-67.5-157.5 kg ha  1 N P2O5 K2O (F3), 750 kg ha  1 HA compound fertilizer with 3 % HA, and 15-9-21 N-P2O5-K2O (F4). The results indicated that F2 and F4 reduced the DM distribution ratio in leaves and stems, concurrently increasing DM accumulation in tuberous roots compared to F1 and F3. These HA fertilizer treatments enhanced the activities of AGPase, UGPase and SSS in tuberous roots during the middle and late growth stages, resulting in elevated total starch content and amylopectin content at harvest. Both types of HA fertilizers decreased the D [4,3] of starch particles, but exhibited minimal effects on PV, HPV, CPV, To, Tc and Delta H. The highest tuberous root yield and starch yield were observed after applying F2 continuously for two years. In conclusion, for optimizing starch yield while preserving its quality, the application of 750 kg ha  1 HA compound fertilizer with 2.6 % HA and 10-8-24 N-P2O5-K2O proved to be most advantageous for sweet potato producers cultivating this high-starch variety in regions with a similar climate in northern China.

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