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Previous issue date: 2009-06-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The Restinga is one type of sand coastal ecosystems that are suffering with high anthropic impact and is important the consideration of any action related to the recovery and conservation of the last remaining areas. For that, is necessary to study the grown and the best conditions for seedling production of species that are native from these ecosystems. In this context, the present work had the objectives: 1- study the response of Senna appendiculata and Senna bicapsularis to different sources and amount of nitrogen. 2- study the response of S. appendiculata, Senna bicapsularis and Machaerium lanceolatum to lime and to a changes in the soil pH. The experiments were conduct under greenhouse conditions in pots filled with sand soil with low fertility. For the experiment with different sources and amount of nitrogen, seven treatments were applied: control (without nitrogen), NO3? (10 mg N/ plant), NO3? (20 mg N/plant), NH4+ (10 mg N/plant), NH4+ (20 mg N/plant), NO3NH4 (10mg N/plant) e NO3NH4 (20 mg N/plant). For the experiments with lime and soil pH, four treatments were applied: 0, 2. 4 and 6 t/ha of lime. For each experiment, the following measurement were made: shot and root dry weight, root length, plant height, soil pH, root/shoot ratio, collar diameter and relative growth rate (RGR was estimated only for S .pendula). The results suggest tendency for indicate that the preferential source of nitrogen for S. appendiculata was NH4+. However for S. pendula with the obtained results is not possible to describe the preferential source of nitrogen, although the grown was affected by the nitrogen applied. None of studied plants had the growth limited by acid soil conditions. Senna appendiculata showed preference for growing at low soil pH and the lime was not necessary for the promotion of plant grown. In this conditions if lime is applied can cause a decrease in plant grown. Lime applied showed no effect on the growth of M. lanceolatum. / Devido ao elevado estado de degrada??o dos ecossistemas de restinga ? de extrema import?ncia considerar a??es para a conserva??o e recupera??o dos poucos remanescentes ainda existentes. Para isso faz-se necess?ria a realiza??o de estudos relacionados ao crescimento das esp?cies encontradas nestas ?reas, visando melhores condi??es para a produ??o de mudas. Dentro desta proposta, o presente trabalho teve como objetivos: 1- avaliar o crescimento de Senna appendiculata e Senna bicapsularis, utilizando diferentes fontes e doses de nitrog?nio mineral; e 2- caracterizar a resposta de Senna appendiculata, Senna bicapsularis e Machaerium lanceolatum ? calagem e a mudan?as do pH do solo. Os experimentos foram conduzidos em condi??es de casa de vegeta??o, em vasos contendo como substrato, solo arenoso de baixa fertilidade. Para o experimento de efeito de diferentes doses e fontes de nitrog?nio foram utilizados sete tratamentos: testemunha (sem nitrog?nio), NO3? (10 mg N/planta), NO3? (20 mg N/planta), NH4+ (10 mg N/planta), NH4+ (20 mg N/planta), NO3NH4 (10mg N/planta) e NO3NH4 (20 mg N/planta). No experimento de resposta ? calagem e mudan?a do pH do solo foram utilizados quatro tratamentos: 0, 2, 4 e 6 t de calc?rio/ha. Os par?metros avaliados foram: altura da planta, comprimento da raiz, ac?mulo de mat?ria seca da raiz e da parte a?rea, di?metro do coleto, pH do solo, rela??o raiz/parte a?rea, incremento m?dio em altura (IMA) e taxa de crescimento relativo, este ?ltimo apenas para a esp?cie S. pendula. Os resultados obtidos apresentam uma tend?ncia a indicar que a fonte preferencial de nitrog?nio para a esp?cie S. appendiculata seria o am?nio. O crescimento da esp?cie Senna pendula foi influenciado pela aplica??o de nitrog?nio, no entanto n?o foi poss?vel determinar a fonte de nitrog?nio preferencial. Nenhuma das esp?cies estudadas teve seu crescimento limitado em condi??es de solo ?cido. A esp?cie S. appendiculata demonstrou prefer?ncia por solos ?cidos e a calagem n?o seria necess?ria para a produ??o de mudas desta esp?cie, podendo influenciar negativamente o crescimento da mesma. A calagem n?o influenciou o crescimento de M. lanceolatum.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/481 |
| Date | 29 June 2009 |
| Creators | Sampaio, Ludmila de Carvalho |
| Contributors | Goi, Silvia Regina |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Ci?ncias Ambientais e Florestais, UFRRJ, Brasil, Ci?ncias Agr?rias |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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