| Effects of organic manure replacing nitrogen fertilizer on dry matter accumulation, distribution and yield of broomcorn millet in dryland areas of Northwest China |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2026.04.02 |
| Key Words: broomcorn millet organic manure replacing nitrogen fertilizer dry matter accumulation and distribution yield nitrogen use efficiency Logistic equation |
| Author Name | Affiliation | | LI Yawei | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHENG Jinhuan | College of Life Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Lei | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | DONG Kongjun | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | REN Ruiyu | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | HE Jihong | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIU Tianpeng | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | CHEN Yiyou | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Xianfeng | Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Tianyu | Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
|
| Hits: 24 |
| Download times: 3 |
| Abstract: |
| During the 2023-2024 growing season, a field experiment was conducted using the broomcorn millet variety ‘Longmi 17’ as the test material. Four treatments were established: single application of nitrogen fertilizer (N), 100% organic manure replacing nitrogen fertilizer (OM), 50% organic manure replacing nitrogen fertilizer (NOM), and no fertilization control (CK). The regulatory effects of different organic replacement ratios of nitrogen fertilizer on dry matter accumulation and distribution characteristics, nitrogen use efficiency, and yield formation of broomcorn millet in the arid regions of Northwest China were investigated. The results showed that fertilization could significantly optimize the dry matter accumulation and distribution characteristics of broomcorn millet. Logistic equation fitting analysis revealed that compared with CK, the average dry matter accumulation rate of N, OM, and NOM treatments during the gradual growth period was significantly increased by 40.6%-50.3%, 20.9%-23.6%, and 30.7%-40.9%, respectively. The duration of the rapid growth period of dry matter was significantly extended by 3.9-4.2, 2.1-2.9, and 1.9-3.3 days, respectively, and the duration of the slow growth period was significantly extended by 4.9-5.3, 2.6-3.7, and 2.3-4.1 days, respectively. All fertilization treatments delayed the growth process of broomcorn millet to varying degrees by increasing the dry matter accumulation rate and prolonging the accumulation duration. The growth periods of N, OM, and NOM treatments were extended by 8.6-8.7, 3.3-7.0, and 2.7-7.2 days, respectively, and the dry matter accumulation was significantly increased by 31.2%-31.3%, 17.6%-19.1%, and 24.9%-26.6%, respectively. Among these, the NOM treatment resulted in a lower proportion of dry matter distributed to vegetative organs at maturity and significantly improved nitrogen fertilizer dry matter production efficiency. Two-year experimental data indicated that the grain yield of broomcorn millet under N, OM, and NOM treatments was significantly increased by 45.9%-47.7%, 23.1%-25.7%, and 44.0%-47.3%, respectively, compared with CK. The yield of NOM treatment was basically the same as that of N, and was significantly higher than OM treatment. Path analysis showed that spike number was the primary factor affecting grain yield, followed by grain number per spike. Furthermore, the NOM treatment exhibited significantly higher nitrogen use efficiency, nitrogen agronomic efficiency, and partial factor productivity of nitrogen than the OM treatment, with increases ranging from 83.7% to 88.5%, 83.8% to 90.3%, and 17.0% to 17.2%, respectively. In conclusion, 50% organic manure replacing nitrogen fertilizer (NOM) can effectively optimize dry matter accumulation and distribution characteristics of broomcorn millet, achieving both high nitrogen use efficiency and stable yield. This practice is a suitable cultivation model for reducing chemical fertilizer input, lowering costs, and improving efficiency in the arid regions of Northwest China. |
|
|
|