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Optimal Nitrogen Fertilization Management of Seed-sowing Rapeseed in Yangtze River Basin of China.
- Source :
-
Pakistan journal of biological sciences : PJBS [Pak J Biol Sci] 2019 Jan; Vol. 22 (6), pp. 291-298. - Publication Year :
- 2019
-
Abstract
- Background and Objective: For cultivation and high yield of oilseed rape (Brassica napus L.) in China, traditional seedling transplanting is replaced by seed-sowing but, better nitrogen management is crucial and not established yet. This study aimed to adapt N management to the seed-sowing method for the winter oilseed rape and to minimize the N fertilizer-derived pollution potential in the upper reaches of Yangtze River Basin.<br />Materials and Methods: Three field experiments were conducted to check effect of different doses of N fertilizers, split doses of N and different types of N fertilizers for seed-sowing winter oilseed rape with high plant density in upper reaches of Yangtze River Basin in Sichuan province of China.<br />Results: In first experiment, among four doses (0, 90, 180 and 270 kg N ha-1) on average 3.54 t ha-1 was in 180 kg N ha-1 and 3.61 t ha-1 in 270 kg N ha-1 while cultivars dy6 and cn3 produced 3.23 and 3.29 t ha-1 which is significantly higher than zs11. There was no significant difference in N-use efficiency among three cultivars tested and second experiment showed no significant difference in seed yield with split N application. The third experiment compared the effects of different fertilizer types (urea, coated urea, 1:1 mixture of urea and coated urea and compound nitrogen fertilizer) on seed yield and get no significant difference in seed yield.<br />Conclusion: This experiment proved that seed sowing method with higher nitrogen had high yield in the upper reaches of Yangtze River Basin in China, but higher N application may cause environment pollution. So, seed sowing method with nitrogen 180 kg N ha-1 was proved to be more effective.
Details
- Language :
- English
- ISSN :
- 1812-5735
- Volume :
- 22
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Pakistan journal of biological sciences : PJBS
- Publication Type :
- Academic Journal
- Accession number :
- 31930852
- Full Text :
- https://doi.org/10.3923/pjbs.2019.291.298