| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Oeste Paulista, Dept Agron, Raposo Tavares HWY, Km 572, BR-19067175 Presidente Prudente, SP - Brazil
[2] Sao Paulo State Univ, Botucatu, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | SCIENTIFIC REPORTS; v. 10, n. 1 NOV 23 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Urochloa grasses are used as cover crops in tropical cropping systems under no-till to improve nutrient cycling. We hypothesized that potassium (K) applied to ruzigrass (Urochloa ruziziensis) grown before cotton in a sandy soil could be timely cycled and ensure nutrition, yield and quality of cotton cultivars with no need to split K application. Field experiments were performed with different K managements, applied to ruzigrass, to cotton grown after grass and without grass, or split as it is done conventionally. No yield differences were observed on K fertilized treatments. At 0 K, cotton yields were low, but they increased by 16% when ruzigrass was grown before, and short fiber content was lower when there was more K available. Ruzigrass grown before cotton increased micronaire as much as the application of 116 kg ha(-1) of K without the grass. Fiber maturity was higher when K was applied to the grass or split in the grass and sidedressed in cotton. Growing ruzigrass before cotton allows for early K fertilization, i.e., application of all the fertilizer to de grass, since the nutrient is recycled, and cotton K nutrition is not harmed. Eventually K rates could be reduced as a result of higher efficiency of the systems. (AU) | |
| FAPESP's process: | 16/16736-4 - Synchronism of potassium release from Urochloa ruziziensis straw and its uptake by cotton cultivars |
| Grantee: | Vinicius Jose Souza Peres |
| Support Opportunities: | Scholarships in Brazil - Master |