|
| Effects of biostimulants on efficiency increase and emission reduction in water spinach cultivation |
| Received:January 22, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:biostimulants;vegetable field;NH3 volatilization;N2O;yield;N use efficiency |
| Author Name | Affiliation | E-mail | | XU Jiyuan | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | HAO Yaqiong | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | SUN Haijun | Nanjing Forestry University, College of Forestry, Nanjing 210037, China | | | DONG Gangqiang | Amway(China)Botanical R&D Center, Wuxi 214115, China | | | MIN Ju | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | jmin@issas.ac.cn | | SHI Weiming | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | |
|
| Hits: 1605 |
| Download times: 1667 |
| Abstract: |
| By observing the effects of different biostimulants on the yield of cabbage and the environmental emission of nitrogen(N)in vegetable field, the species of biostimulants, which are beneficial to the utilization efficiency and environmental emission reduction of CABBAGE planting N, were preliminarily screened out. A soil column simulation experiment was carried out in a vegetable plot facility, and water spinach was planted for two consecutive years. Eight treatments were set up:No N(CK), conventional N(N), and conventional N were combined with fulvic acid(N + HA), algae extracts(N + AE), chitosan(N + CT), fish protein hydrolysates(N + FPH), soy protein hydrolysates(N + PPH), and microbial agent(N + FC). The effects of different biostimulants on yield, N fertilizer efficiency, soil NH3 volatilization, and N2O emission were observed. Compared with the N treatment, different biostimulants promoted N absorption and increase the yield of water spinach shoots, and the increasing effect from high to low was as follows:N+HA, N+AE, N+CT, N+FC, N+ FPH, and N+ PPH. The average yield of N+HA, N+AE and N+CT in two years increased by 29.2%, 26.5%, and 15.0%, respectively, and the apparent utilization rate of N increased from 13.7% to 22.2%, 21.1%, and 19.2%, respectively. The average reduction rate of NH3 volatilization loss was in the following order:N+AE, N+HA, N+ CT, N+FPH, and N+PPH. The average reduction rate of N+HA, N+AE, and N+CT in two years was 16.1%, 24.2%, and 9.6%, respectively. Compared with the N treatment, six biostimulant treatments increased soil N2O emission by 0.16~0.56 kg·hm-2, with an increase rate of 8.4%~29.8%. The synergistic and emission reduction effects of different biostimulants on water spinach were comprehensively analyzed. N fertilizer combined with HA, AE, and CT significantly improved the yield and N fertilizer utilization rate of cabbage and significantly reduced NH3 volatilization emission. In addition, the application of different kinds of biostimulants had the risk of increased N2O emission. |
|
|
|
