1,721,130 research outputs found
Drought resistance and recovery of kentucky bluegrass (Poa pratensis l.) cultivars under different nitrogen fertilisation rates
Full text linkKentucky bluegrass (Poa pratensis L.) is one of the most popular cool-season turfgrass species. However, little is known about the effects of N supply on its resistance to drought stress. The objective of this study was to assess the effects of acute drought followed by a recovery period on four Kentucky bluegrass cultivars (‘Barduke’, ‘Brooklawn’, ‘NuBlue Plus’ and ‘Marauder’) and one tall fescue (‘Rhambler SRP’) under two different nitrogen fertilisation rates (100 or 200 kg N ha−1 yr−1 ). The study was conducted over two years in a rain-out structure to control water input in spring and summer. The cultivars were subjected to a drought stress phase (absence of irrigation) followed by a recovery phase (weekly irrigation with an intake of 80% of ET). The green cover percentage, visual quality, NDVI, and soil moisture were measured weekly. We found that Kentucky bluegrass maintains sufficient turf quality for 2 weeks without irrigation. During the first year of the experiment, slight differences were observed among the Kentucky bluegrass cultivars, with ‘Marauder’ showing a 15% of green turf cover less than ‘Brooklawn’ after 6 weeks of acute drought, while in the second year, ‘NuBlue Plus’ displayed higher green turf cover and NDVI than the other cultivars. Nitrogen treatment had limited influence on the performances of the cultivars, ‘Marauder’ being the only one benefitting from the higher rate of applications
Allegato D alla DGR del Veneto del 7 agosto 2007, n. 2439 - Bilanci aziendali dell'azoto e del fosforo negli allevamenti.
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Modelli di quantificazione delle escrezioni di azoto e fosforo negli allevamenti di pollastre e avicoli da carne del Veneto.
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ALLEGATO A al DDR Veneto 308 del 200
Modelli di quantificazione delle escrezioni di azoto e fosforo negli allevamenti di ovaiole del Veneto
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Modelli di quantificazione delle escrezioni di azoto e fosforo nei centri specializzati per lo svezzamento dei suinetti del Veneto
No full textModelli di quantificazione delle escrezioni di azoto e fosforo negli allevamenti di suini in accrescimento del Veneto
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ALLEGATO A al DDR Veneto 308 del 200
Escrezioni di Azoto e fosforo nelle principali tipologie di allevamento intensivo in Italia: quantificazione su base aziendale: 8. allevamenti di pollastre e avicoli da carne
No full textEscrezione di azoto e fosforo nelle principali tipologie di allevamento intensivo in Italia: quantificazione su base aziendale: 6. centri specializzati nello svezzamento di suinetti
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