The effect of fertilisation with digestate on kohlrabi yields and quality

Plant, Soil and Environment

E. Von Bennewitz¹  T. Lošák¹  T. Válka¹  J. Elbl¹  T. Vítěz¹  J. Hlušek¹  H. Bělíková¹ 

关键词: anaerobic digestion;    vegetable;    biogas plants;    renewable energy;    Brassica oleracea;   

DOI  :  10.17221/16/2016-PSE

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

Three treatments were used in a two-year (2014�?2015) vegetation pot experiment with kohlrabi of the cv. Moravia: (1) untreated control; (2) digestate; (3) digestate + phosphorus (P). The nitrogen (N) rate was the same in treatments 2�?3. There were significant differences between years in all parameters. The weight of single kohlrabi bulbs in the unfertilised control was significantly lower in both years (33.1�?46.9%) than in the digestate treatment (100%). Digestate supplemented with P (treatment 3) increased the bulb yield significantly by 11.0�?14.3% compared with pure digestate (treatment 2). In both years the content of bulb nitrates (mg NO3�?/kg FM (fresh matter)) was significantly the lowest in the unfertilised control (135 and 163, respectively). After digestate applications the nitrates content (mg NO3�?/kg FM) increased significantly in both years, i.e. to 315�?327 (2014) and to 486�?509 (2015) compared to unfertilised control. In two years the content of ascorbic acid (mg/kg FM) did not differ among the three treatments (274�?288 in 2014 and 311�?329 in 2015). Digestates can be recommended for kohlrabi fertilisation prior to planting. 

【 授权许可】

Unknown