| dc.creator | ROSOLEM, C.A. | |
| dc.creator | SILVA, R.H. da | |
| dc.creator | ESTEVES, J.A. de F. | |
| dc.date | 2011-04-09T12:28:55Z | |
| dc.date | 2011-04-09T12:28:55Z | |
| dc.date | 2003 | |
| dc.date | 2003-06-25 | |
| dc.date.accessioned | 2017-03-06T19:26:25Z | |
| dc.date.available | 2017-03-06T19:26:25Z | |
| dc.identifier | 24590 | |
| dc.identifier | http://www.alice.cnptia.embrapa.br/handle/doc/109004 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/265563 | |
| dc.description | Cotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime. Mass flow and diffusion increased linearly with K levels up to 60 mg kg-1, in pots with lime. In pots without lime the amount of K reaching the roots by diffusion increased up to 45 mg kg-1, but decreased at the highest K level. Accordingly, there was more K reaching the roots through mass flow at the highest K level. This happened because there were more fine roots in pots without lime, at the highest K level. As the roots grew closer, there was a stronger root competition leading to a decrease in the amount of K diffused to cotton roots. | |
| dc.description | 2003 | |
| dc.language | en | |
| dc.publisher | Pesquisa Agropecuária Brasileira, Brasília, v.38, nº 5, p. 635-641, maio 2003. | |
| dc.relation | Área de Informação da Sede - Artigo em periódico indexado (ALICE) | |
| dc.subject | Gossypium hirsutum | |
| dc.subject | mass | |
| dc.subject | diffusion | |
| dc.subject | liming materials | |
| dc.subject | roots | |
| dc.subject | growth | |
| dc.subject | plant nutrition | |
| dc.subject | massa | |
| dc.subject | difusão | |
| dc.subject | correção calcária | |
| dc.subject | raiz | |
| dc.subject | crescimento | |
| dc.subject | nutrição vegetal | |
| dc.title | Potassium supply to cotton roots as affected by potassium fertilization and liming. | |
| dc.type | Artículos de revistas | |
