Back to Search
Start Over
Effect of Different Long-Term Potassium Dosages on Crop Yield and Potassium Use Efficiency in the Maize–Wheat Rotation System.
- Source :
-
Agronomy . Oct2022, Vol. 12 Issue 10, pN.PAG-N.PAG. 14p. - Publication Year :
- 2022
-
Abstract
- Potassium (K) is the second most important plant nutritional element and is used for numerous physiological processes. We established an eight-year experiment comparing the effects of five K fertilization treatments (0, 48, 84, 120 and 156 kg K ha−1) on crop yield, K use efficiency and soil apparent K balance under the maize–wheat rotation system in the North China Plain. The highest maize and wheat yields were achieved in the K120 treatment, increasing by up to 16.7% and 25.1%, respectively. The increase in grain yield and K agronomic efficiency (AEK) with K application was greater in wheat than in maize. The K recovery efficiency (REK) and K accumulative recovery efficiency (ARE) significantly decreased with the increase in K fertilization in the maize and wheat seasons. However, the soil apparent K balance and soil available K content increased; the former was deficiency (−24.3 kg ha−1 yr−1) in the K0 treatment, but the latter did not decrease significantly compared with that in the initial year of the experiment. The soil available K content increased by 10.9 mg kg−1 per 100 kg ha−1. In conclusion, the yield response to K fertilization was greater in wheat than in maize and alleviated soil K depletion, but the K fertilizer efficiency was lower. We believed that K fertilizer can be increased moderately in the wheat season and decreased in the maize season. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CROP yields
*POTASSIUM
*CROP rotation
*GRAIN yields
*WHEAT
*CORN
Subjects
Details
- Language :
- English
- ISSN :
- 20734395
- Volume :
- 12
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Agronomy
- Publication Type :
- Academic Journal
- Accession number :
- 159871077
- Full Text :
- https://doi.org/10.3390/agronomy12102565