|
| Dynamic and profile variations of free amino acids in paddy soil applied with Chinese milk vetch |
| Received:May 03, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:Chinese milk vetch;soil;rice;free amino acid;composition;profile distribution;influencing factor |
| Author Name | Affiliation | E-mail | | YANG Jing | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | BAO Qingtao | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | XING Shihe | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Key Laboratory of Soil Ecosystem Health and Regulation, Fuzhou 350002, China | | | ZHOU Biqing | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Key Laboratory of Soil Ecosystem Health and Regulation, Fuzhou 350002, China | | | ZHANG Liming | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Key Laboratory of Soil Ecosystem Health and Regulation, Fuzhou 350002, China | | | YANG Wenhao | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fujian Provincial Key Laboratory of Soil Ecosystem Health and Regulation, Fuzhou 350002, China | a199905@163.com |
|
| Hits: 726 |
| Download times: 698 |
| Abstract: |
| This study was conducted to investigate the dynamics of free amino acid(FAA) contents and components in paddy soil and their influencing factors, and to clarify the characteristics of FAA profile migration in paddy soil. In this study, a single application of chemical fertilizer(CK) was used as control under equal nitrogen, phosphorus, and potassium conditions, and different application rates of Chinese milk vetch[30 000 kg · hm-2(CMV1) and 45 000 kg · hm-2(CMV2)] were selected to investigate the dynamic and profile distribution characteristics of FAA content and composition in paddy soil. The FAA content in paddy soil decreased from the background to the seedling stage after CMV application and then increase rapidly to a peak at the blooming stage and then decreased slowly. The FAA contents in CMV1 and CMV2 treatments were significantly increased by 14.01% and 21.75% compared with CK treatment, respectively. The FAA content of neutral amino acids was the highest(93.39%-97.52%), followed by acid(2.19%-5.86%) and alkaline amino acids(0-1.47%) under different fertilization treatments during the sampling period, and the content of sarcosine, glycine, alanine, valine, isoleucine, leucine and phenylalanine was most abundant, accounting for 65.93%-82.65% of the FAA pool. FAA had a downward migration trend, mainly to 20-40 cm, and the mobility of serine, glycine, and threonine was high. The neutral FAA was significantly correlated with pH, organic matter, total nitrogen, protease, and bacterial copy number; alkaline FAA was significantly correlated with protease and bacterial copy number; and acidic FAA was only significantly correlated with bacterial copy number. Conclusively, FAA content, composition and migration in paddy soil were closely related to CMV application rate and rice growth period, and its responses to soil properties varied. |
|
|
|
