Short- and long-term effects of site preparation, fertilization and vegetation control on growth and stand development of planted loblolly pine

Nilsson, Urban; Allen, H. Lee

doi:10.1016/s0378-1127(02)00140-8

Cited by 93 publications

(71 citation statements)

References 21 publications

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“…O manejo silvicultural interfere diretamente na produtividade florestal, pois maximiza a expressão da qualidade do material genético e do potencial produtivo intrínseco do sítio através do aumento da disponibilidade de recursos essenciais ao crescimento, principalmente água, luz e nutrientes (NILSSON; ALLEN, 2003;STAPE, 2002).…”

Section: Introductionunclassified

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UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

Hakamada

Stape

Lemos

et al. 2015

CERNE

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RESUMO:Indivíduos de povoamentos clonais possuem a mesma capacidade de crescimento. Porém, falhas silviculturais podem levar ao fornecimento parcial ou heterogêneo de recursos, resultando em perdas de uniformidade. Estudos demonstram que a heterogeneidade entre plantas interfere na produtividade. Apesar disso, poucos trabalhos acompanharam a uniformidade do início ao fim da rotação e determinaram se o nível de uniformidade inicial interfere na produtividade na idade de corte. Assim, objetivou-se investigar o comportamento da uniformidade entre árvores ao longo de uma rotação e sua relação com a produtividade em Eucalyptus clonais. Replicou-se um ensaio em blocos casualizados em três localidades contrastando um tratamento uniforme, com mudas plantadas no mesmo momento, com um tratamento heterogêneo, onde se plantou cada terço das mudas aleatoriamente aos zero, quarenta e oitenta dias. Incremento Médio Anual (IMA) e o PV50, indicador de uniformidade do povoamento, foram determinadas trimestralmente entre 12 e 72 meses. A uniformidade foi máxima no fechamento da copa e reduziu gradualmente até o final da rotação. Porém, desde o início o tratamento heterogêneo apresentou uniformidade inferior ao uniforme. Ao final da rotação, a diferença média do PV50 entre os tratamentos nas três localidades foi de 119%. A uniformidade inicial (12, 18 e 24 meses) foi correlacionada à uniformidade (R² >0,67; p<0,001) e também à produtividade ao final da rotação (72 meses) (R² >0,43; p<0,001), sendo as parcelas mais uniformes aquelas mais produtivas. Os resultados apontam para a importância de uma silvicultura que garanta o fornecimento homogêneo de recursos. UNIFORMITY BETWEEN TREES IN A FULL ROTATION AND ITS RELATIONSHIP WITH PRODUCTIVITY IN CLONAL EucalyptusABSTRACT: Tree clonal plantations have identical growing capability. However, operational failures lead to heterogeneous resources supply, resulting in losses of uniformity. Scientific evidences have shown heterogeneity between plants interfere on wood productivity. Nevertheless, few studies relate uniformity since the beginning of rotation and determine relationship between productivity and uniformity. So, we aim to investigate the behavior of uniformity along a rotation and its relationship with productivity in Eucalyptus clonal plantation. For this, a randomized block experiment was replicated in three experimental sites. A uniform treatment, with all seedlings planted at the same time was contrasted with a heterogeneous treatment, where a third of seedlings were randomly planted on days 0, 40 and 80. Productivity and uniformity were determined quarterly from 12 to 72 months. In both treatments uniformity peaked at the time of canopy closure and was gradually reduced until the end of the rotation. However, since the beginning the heterogeneous treatment was less uniform than the uniform treatment for all sites, reaching an average difference of 119% for the PV50 at the end of rotation. Initial uniformity (12, 18 and 24 months) was highly correlated with final productivity (7...

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Section: Introductionunclassified

“…Estudos têm demonstrado que atividades silviculturais como preparo de solo (ORLANDER et al, 2002), fertilização (NILSSON;ALLEN, 2003), controle de plantas daninhas (LITTLE et al, 2003) e número de indivíduos por hectare (SILVA, 2006) podem interferir diretamente na uniformidade e, consequentemente, na produtividade.…”

Section: Introductionunclassified

UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

Hakamada

Stape

Lemos

et al. 2015

CERNE

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“…The growth response of plantations to mid-rotation application of fertilizer may follow four patterns (type A, B, C, and D) relative to an untreated control. A treatment response is considered type A if growth increments increase throughout the rotation and result in an increased carrying capacity (Snowdon, Waring 1984;Snowdon 2002;Nilsson, Allen 2003;Albaugh et al 2015). Response to P fertilization at planting on P limited sites, but also treatments that reduce or eliminate hardwood competition (e.g., soil tillage, herbicide application) may result in a type A response (Zutter, Miller 1998;Nilsson, Allen 2003).…”

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confidence: 99%

“…A treatment response is considered type A if growth increments increase throughout the rotation and result in an increased carrying capacity (Snowdon, Waring 1984;Snowdon 2002;Nilsson, Allen 2003;Albaugh et al 2015). Response to P fertilization at planting on P limited sites, but also treatments that reduce or eliminate hardwood competition (e.g., soil tillage, herbicide application) may result in a type A response (Zutter, Miller 1998;Nilsson, Allen 2003). A response is considered type B if growth increases in response to treatment relative to an untreated control occur for a short time after treatment, then the initial available resources are exhausted or are no longer available, and treated trees then stop responding (Albaugh et al 2015).…”

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confidence: 99%

Mid-rotation response to fertilizer by Pinus radiata D. Don at three contrasting sites

Alzate¹,

Rubilar²,

Montes³

et al. 2016

J. For. Sci.

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Mid-rotation responses to fertilization of Pinus radiata D. Don plantations after the first or second thinning have been observed in research experiments in many regions where the species is grown. The practice is not however common in commercial plantations. This is probably because the effects of soil-site conditions on the magnitude and duration of tree and stand growth responses are not well understood. The effects of nitrogen (150 and 300 kg N·ha -1 ) and phosphorus (0, 20 and 40 kg P·ha -1 ) including common base fertilization of boron (8 kg B·ha -1 ) and potassium (65 kg K·ha -1 ) were evaluated in three mid-rotation P. radiata plantations after thinning. The plantations were located on sites with contrasting nutrient and water availability, sandy, granitic and redclay sites, in south-central Chile. The magnitude and duration of growth response was site specific. After 8 years, the growth response to the highest dose of fertilization relative to the control was 57 m 3 ·ha -1 (16%) at the granitic and 24 m 3 ·ha -1 (14%) at the sandy site. No response to either nitrogen or phosphorus fertilizer was observed at the red-clay site. Nitrogen and phosphorus were limiting at both granitic and sandy sites, and high fertilization doses considering 300 kg N·ha -1 plus 40 kg P·ha -1 would ameliorate nutrient resource limitations and yield a cost-effective increment in stand volume.

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“…В Карелии также на протяжении многих лет проводили экспериментальные исследования воздействия минеральных удобрений на про-дуктивность древесных насаждений и плодо-родие лесных почв [Левкина, 1964; Куликова, 1977; Федорец, Морозова, 1985; Чернобров-кина, 2001]. В настоящее время исследова-тели продолжают уделять внимание данной проблеме [Nilsson, Allen, 2003;Will et al, 2006;Коновалов, Зарубина, 2011;Lindkvist et al, 2011;Johansson et al, 2013 и другие], но в свя-зи с повышенными требованиями к экологии окружающей среды, дороговизной удобрений и большим объемом уже накопленных знаний акцент проблемы смещается на поиски путей рационального и безопасного в долгосрочной перспективе использования удобрений. Це-лью настоящих исследований явился анализ результатов многолетних стационарных опы-тов, отражающих последействие удобрений на качество почвы и продуктивность древес-ных насаждений.…”

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Mineral Fertilizers’ After-Effect on Soil Properties and Stand Productivity in a Long-Term Experiment in Karelian Middle Taiga

Солодовников

Федорец

Fedorets

et al. 2017

Proceedings of KarRC of RAS

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Short- and long-term effects of site preparation, fertilization and vegetation control on growth and stand development of planted loblolly pine

Cited by 93 publications

References 21 publications

UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

UNIFORMIDADE ENTRE ÁRVORES DURANTE UMA ROTAÇÃO E SUA RELAÇÃO COM A PRODUTIVIDADE EM Eucalyptus CLONAIS

Mid-rotation response to fertilizer by Pinus radiata D. Don at three contrasting sites

Mineral Fertilizers’ After-Effect on Soil Properties and Stand Productivity in a Long-Term Experiment in Karelian Middle Taiga

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