| Effects of subsoiling on roots distribution and nitrogen accumulation and utilization of spring maize |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2020.05.25 |
| Key Words: subsoiling spring maize root morphological yield nitrogen absorption efficiency |
| Author Name | Affiliation | | ZHANG Ruifu | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | YANG Hengshan | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | ZHANG Yuqin | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | FAN Xiuyan | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | LIU Jing | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | LIU Baolin | Agricultural Technology Extension Center of Farming and Animal Husbandry Bureau of Horqin Right Front Banner, Hinggan League, Inner Mongolia 137423， China | | XUE Xinwei | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China | | LI Dandan | College of Agriculture, Inner Mongolia University for Nationalities, Inner Mongolia Autonomous Region Forage Crop Engineering Technology Research Center, Tongliao, Inner Mongolia 028042, China |
|
| Hits: 743 |
| Download times: 502 |
| Abstract: |
| The subsoiling plus rotary tillage (S+R) and rotary tillage (R) were studied for their effects on root distribution and nitrogen (N) accumulation and utilization of spring maize using Xianyu 335 and Zhengdan 958 as experimental materials from 2015 to 2016. The results showed as following. The subsoiling loosed soil and promoted the root system growing down. Compared with R, the total root dry weight of Xianyu 335 and Zhengdan 958 of S+R increased by 7.35% and 9.25%, respectively, among of which the total root dry weight increased by 15.52% and 24.07% in 20~40 cm soil layer and the root number and root width under 30 cm soil layer also increased significantly. The improvement of characteristics of root morphology increased the contact opportunity between root and N, which improved the N absorption and accumulation of spring maize and made the N uptake per unit weight root increased obviously. Compared with R, the N uptake per unit weight root of Xianyu 335 and Zhengdan 958 of S+R before silking stage increased by 11.22% and 12.03%, respectively, and the difference between treatments reached a significant level; the absorption efficiency of N of Xianyu 335 and Zhengdan 958 with S+R increased by 6.11~6.40 kg·kg-1 and 7.17~7.51 kg·kg-1, respectively. Partial productivity of N fertilizer with S+R increased by 3.86~8.00 kg·kg-1 and 5.40~9.86 kg·kg-1; the N accumulation in the aboveground part with S+R increased by 33.73~35.66 kg·hm-1 and 27.85~36.61 kg·hm-1. Compared with Xianyu 335, Zhengdan 958 was more sensitive to subsoiling. |
|
|
|