Humic Acid and Biochar Application: Effects on Nitrogen Absorption of Feeding Sweet Sorghum and Soil Nitrogen Change

doi:10.11924/j.issn.1000-6850.casb19030100

Abstract

Abstract:

The paper aims to improve soil nitrogen utilization and reduce nitrogen accumulation in greenhouse soil. Taking feeding sweet sorghum as a test crop and the humic acid and biochar as the test materials for pot experiment, the effects of humic acid and biochar application with different proportions on nitrogen absorption and soil nitrogen change of feeding sweet sorghum were studied. The experiment set 6 treatments, i.e., CK, biochar, humic acid, humic acid+biochar, humic acid+1/2 biochar, 1/2 humic acid+biochar.The results showed that: feeding sweet sorghum under the treatment of the 1/2 humic acid+biochar treatment had the largest nitrogen absorption in shoots, indicating the treatment could increase the proportion of nitrogen to the shoots, and improved the nitrogen absorption of feeding sweet sorghum; humic acid+biochar treatment could reduce soil nitrogen content and was good for soil nitrogen transformation. Therefore, the combination of humic acid and biochar with a suitable ratio has a positive effect on increasing nitrogen utilization rate, promoting soil nitrogen transformation and reducing soil nitrogen accumulation.

Key words: humic acid, biochar, high-nitrogen soils, nitrogen absorption, feeding sweet sorghum, potted culture

CLC Number:

S156.2
S514

Zhao Siwen, Wang Xi, Lu Shuchang, Zhang Yu. Humic Acid and Biochar Application: Effects on Nitrogen Absorption of Feeding Sweet Sorghum and Soil Nitrogen Change[J]. Chinese Agricultural Science Bulletin, 2020, 36(18): 93-96.

Figures/Tables 5

References 27

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处理	不同部位
处理	根	茎	叶	穗
T1	0.300±0.050a	0.677±0.135ab	0.323±0.075bc	0.200±0.020ab
T2	0.210±0.090ab	0.717±0.095a	0.280±0.012bc	0.220±0.050a
T3	0.213±0.065ab	0.610±0.000ab	0.197±0.025c	0.190±0.030ab
T4	0.173±0.045b	0.600±0.000ab	0.420±0.110b	0.153±0.015b
T5	0.227±0.045ab	0.587±0.055ab	0.330±0.030bc	0.197±0.006ab
T6	0.223±0.015ab	0.563±0.006b	0.577±0.015a	0.160±0.030b

处理	不同部位
处理	根	茎	叶	穗
T1	0.300±0.050a	0.677±0.135ab	0.323±0.075bc	0.200±0.020ab
T2	0.210±0.090ab	0.717±0.095a	0.280±0.012bc	0.220±0.050a
T3	0.213±0.065ab	0.610±0.000ab	0.197±0.025c	0.190±0.030ab
T4	0.173±0.045b	0.600±0.000ab	0.420±0.110b	0.153±0.015b
T5	0.227±0.045ab	0.587±0.055ab	0.330±0.030bc	0.197±0.006ab
T6	0.223±0.015ab	0.563±0.006b	0.577±0.015a	0.160±0.030b