| Effects of biochar\|based organic fertilizer combined with nitrogen fertilizer on soil aggregate structure, yield, and quality of purple cabbage |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2025.03.15 |
| Key Words: purple cabbage biochar\|based organic fertilizer reduced nitrogen fertilizer water\|stable aggregates nitrogen use efficiency yield |
| Author Name | Affiliation | | WU Zeting | School of Soil and Water Conservation, Southwest Forestry University, Kunming, Yunnan 650224, China | | LI Xiaoying | School of Soil and Water Conservation, Southwest Forestry University, Kunming, Yunnan 650224, China | | YANG Ben | China Agricultural and Rural Bureau, Lianchi District, Baoding, Hebei 071030, China | | SU Xiaojuan | School of Soil and Water Conservation, Southwest Forestry University, Kunming, Yunnan 650224, China |
|
| Hits: 2 |
| Download times: 0 |
| Abstract: |
| To address the issues of soil acidification and compaction in the Yuanmou Basin caused by excessive nitrogen fertilizer application, a field experiment was conducted using purple cabbage as the test crop. A two\|factor, three\|level randomized complete block design was employed to examine the effects of varying fertilization rates on the distribution and stability of soil aggregates, as well as the yield and quality of purple cabbage. The experiment involved three application levels of biochar\|based organic fertilizer: 15 t·hm-2 (T1), 30 t·hm-2 (T2), and 45 t·hm-2 (T3). In addition, based on the local conventional nitrogen fertilizer rate of 420 kg·hm-2 (N3), nitrogen fertilizer application was reduced by 100%, 50%, and 25%, resulting in the following treatments: 0 kg·hm-2 (N0), 210 kg·hm-2 (N1), and 315 kg·hm-2 (N2). A control group (CK) received no fertilizer. Developing a comprehensive application plan to explore an optimal fertilization strategy by examining the effects of different fertilizer combinations on soil aggregate distribution and stability, as well as the yield and quality of purple cabbage. The results showed that, compared with CK, the application of carbon\|based organic fertilizer combing with different levels of nitrogen fertilizer increased the proportion of aggregate of >5 mm, 2~5 mm, 1~2 mm, 0.5~1 mm, and their R0.25, MWD and GMD values were increased by 13.11%~24.59%,55.13%~174.36% and 20.83%~40.28%. There was no significant difference in the head weight, economic yield and biological yield of purple cabbage between the treatments of 50% and 25% reduction of biochar\|based organic fertilizer combined with nitrogen fertilizer, but they were 10.01%~32.33%, 8.69%~36.21% and 3.10%~33.33% higher than those of the same amount of biochar\|based organic fertilizer combined with conventional nitrogen treatment. Under the same amount of biochar\|based organic fertilizer application, compared with the conventional nitrogen application rate, the combined application of nitrogen reduction treatment increased the nitrogen agronomic utilization rate by 65.87%~216.33%, the nitrogen partial productivity by 58.17%~172.42% and the nitrogen fertilizer performance utilization rate by 0.32%~292.85%, respectively. The combined application of biochar\|based organic fertilizer and reduced nitrogen fertilizer significantly increased nitrogen agronomic efficiency, nitrogen partial factor productivity and nitrogen apparent efficiency. The contents of vitamin C, soluble sugar, soluble protein and anthocyanin in purple cabbage head treated with T2N1 were higher than those in other treatments, which were significantly increased by 53.08%, 13.86%, 64.94% and 89.73%, compared with the treatment of conventional nitrogen application (T2N3) under the same conditions. The two\|way analysis of variance revealed a significant interaction between biochar\|based organic fertilizer and nitrogen fertilizer. The principal component analysis indicated that the combined application of 30 t·hm-2 of biochar\|based organic fertilizer and 210 kg·hm-2 of nitrogen fertilizer (T2N1) was more beneficial for the green and high\|yield cultivation of purple cabbage in the Yuanmou area. This approach also achieved fertilizer reduction and increased efficiency in purple cabbage production. |
|
|
|