Biomassa de mudas de pepinos híbridos conduzidos sob ambientes protegidos

Abstract

O estudo de oleráceas no Estado de Mato Grosso do Sul, especialmente na região do Pantanal, é fundamental para o desenvolvimento do comércio local e sustentabilidade dos pequenos produtores que circunvizinham as áreas urbanas. Neste contexto, foi desenvolvido experimento com produção de mudas de pepino, estudando o acúmulo de biomassa aérea e radicular dos híbridos Aladdin F1, Nikkey, Safira e Nobre F1, em diferentes ambientes de cultivo e substratos. O experimento foi realizado em 2007, utilizando três ambientes de cultivo: (A1) estufa plástica; (A2) viveiro telado com sombrite® e (A3) viveiro telado com aluminet®. Foram utilizadas três composições de substratos S1 (solo + fibra de coco); S2 (solo + pó-de-serra) e S3 (solo + composto orgânico). A resposta dos híbridos de pepinos em termos de biomassa seca das mudas dependeu do substrato e do ambiente de cultivo. O substrato "solo e fibra de coco" promoveu maior acúmulo de biomassa na estufa e no viveiro com tela de monofilamento. O substrato "solo e composto orgânico" proporcionou maior biomassa aérea no viveiro com aluminet®. O híbrido 'Safira' acumulou maior biomassa radicular nos telados e no substrato "solo e fibra de coco". O híbrido 'Nikkey' acumulou maior biomassa radicular no viveiro com aluminet® e no substrato "solo e fibra de coco", sem diferir de "solo e pó-de-serra". Os híbridos 'Aladdin F1' e 'Nobre F1' acumularam biomassa radicular similar nos ambientes; 'Aladdin F1' teve maior acúmulo com os substratos "solo e composto orgânico" e "solo e fibra de coco", e 'Nobre F1', maior acúmulo com "solo e fibra de coco", sem diferir de "solo e pó-de-serra".

Production of tomato seedlings using different substrates and trays in three protected environments

“…This happened because the screenhouse did not present LDPF in its coverings, allowing better heat exchange with external environment; it probably enabled the tomato development. Similar results were observed by COSTA et al (2010) In the interactions between cultivation environments and type of tray were verified larger plants in the Sombrite ® , for all types of tray, and higher aerial dry phytomass in the screenhouses (Sombrite ® and Aluminet ® ), for almost all the studied trays (Table 3). COSTA et al (2010) also found higher dry root phytomass in hybrid plants of Nikkey and Safira cucumber (H3) cultivated in screen environments, if compared with greenhouses.…”

“…Similar results were observed by COSTA et al (2010) In the interactions between cultivation environments and type of tray were verified larger plants in the Sombrite ® , for all types of tray, and higher aerial dry phytomass in the screenhouses (Sombrite ® and Aluminet ® ), for almost all the studied trays (Table 3). COSTA et al (2010) also found higher dry root phytomass in hybrid plants of Nikkey and Safira cucumber (H3) cultivated in screen environments, if compared with greenhouses. In this study, the screen environments (Sombrite ® and Aluminet ® ) allowed the rainwater entrance, what probably accelerated the organic matter degradation of the Organosuper ® and provided larger quantity of nutrients for the plants, possibly by the pH reduction (VALENTE et al, 2009).…”

“…Its knowledge is important for the appropriateness of the production in protected environments, like greenhouses, nurseries and acclimatized greenhouses. COSTA et al (2009a) and COSTA et al (2010) with cucumber and COSTA et al (2011) with eggplant, have been performing studies that evaluate the vegetable environment in seedling formation of high quality vegetables.…”

Effects of Protected Environments on Plant Biometrics Parameters

“…However this environment showed less net energy for growth and development of the crop. Interactions between greenhouse environments, substrates types and different cucumber hybrids were evaluated by Costa et al (2010) and verified different behavior of the substrates in the different environments studied, noting that the seedling growth was affected by the environments and the substrates. Response of cucumber hybrids in terms of seedlings dry biomass depended on the substrate and the growing environment.…”

Guavira emergence and seedling production with substrates containing organic compost and soil under different screen environments

“…In spite of that, for papaya seedlings grown in the same recipient, Costa et al (2010c) verified greater height (27.64 cm) in the thermo-reflecting screen in comparison with those in the black screen (23.96 cm). Costa et al (2010b) observed that, for cucumber seedlings, substrates containing soil and coconut fiber provided greater biomass accumulation in the greenhouse and nursery equipped with black screen in relation to thermo-reflecting screen. It can be noted the reciprocal interaction and influence of environments and substrates in the development of various species, where the factors altogether can induce better environmental, physical, and nutritional conditions.…”