1,720,991 research outputs found
15N-labelled fertilizer recovery by sweet sorghum in Mediterranean climate
Full text linkA 15N-labelled fertilization trial was carried out on sweet sorghum, grown in semi-arid environments of southern Europe with the aim to monitor the efficiency and effectiveness of the N-fertilisation technique under irrigation and different nitrogen fertilization rates, in factorial combination. A rainfed condition was compared with a full irrigation treatment (100% restoration of total crop water consumption), in a similar way, an unfertilized control was tested with respect to N application rates of 60 and 120 Kg ha-1, respectively. The fertilisation efficiency measured directly through the isotope discrimination technique was on average equal to 15%. The aliquot of nitrogen released by the fertiliser into the soil and not absorbed by the plant becomes part of the different components of the soil nitrogen balance, regardless of its origin
Nitrogen bilance durino sweet sorghum cropping cycle as affected by irrigation and fertilization rate
No full textStima della resistenza del manto vegetale ed aggiornamento dei coefficienti colturali secondo i nuovo standard FAO
No full textFotosintesi e movimenti eliotropici delle foglie di fagiolo (Phaseolus vulgaris L.)in risposta allo stato idrico del suolo
No full textS.Rem
Evaluation of Cynodon dactylon germplasm as turfgrass use in southern Italy
No full textThe use of bermudagrass as turfgrass is increasing in Southern Italy due to its
tolerance to drought, heat and salinity stress. Moreover, its aggressive growth and
high recuperative potential, make it best suited for many utilizations such as
recreational areas, amenity and sport uses. The aim of this research was to evaluate
24 wild ecotypes of Cynodon dactylon, collected in Central and Southern Italy. During
the 3 years of research, conducted in Metaponto of Basilicata region, several
agronomic and phenotypic traits (winter dormancy interval, total growth, turf quality,
color index and ground cover percentage) were analyzed, and their performances
were compared with 3 commercial cultivars (‘Panama’, ‘Yukon’ and ‘Tifway 419’).
Some native accessions showed lower tolerance to Bermudagrass white leaf disease
attack (BGWL); three ecotypes (n. 11, 13, and 23) showed a behavior similar to
commercial cultivars, while an ecotype (n. 3) gave better results compared to
commercial cultivars for several quality indexes
Biocide plants as a sustainable tool for the control of pests and pathogens in vegetable cropping systems
No full textSynthetic pesticides have played a major role in crop protection related to the intensification of agricultural systems. In the recent years, environmental side effects and health concerns raised by an indiscriminate use have led the EU to the ban of many synthetic pesticides. As a result of this drastic revision, currently there is a strong need for new and alternative pest control methods. An interesting source of biorational pesticides may be represented by the biocidal compounds naturally occurring in plants as products of the secondary metabolism. Groups of plant secondary metabolites most promising for the development of pesticidal formulations are glucosinolates, saponins, and more generally terpenoid phytoconstituents, such as essential oil and their constituents. Glucosinolates are thioglucosidic secondary metabolites occurring mainly in the Brassicaceae and, at a less extent, in Capparidaceae families. The incorporation of glucosinolate- containing plant material into the soil results in degradation products highly toxic to soilborne pest, pathogens and weeds. This practice, known as biofumigation, may be considered as an ecological alternative to soil toxic fumigants. Plant-derived saponins are triterpene glycosides present in top and root tissues of plant species of the families Leguminosae, Alliaceae, Asteraceae, Polygalaceae and Agavaceae. Saponins and saponin-rich plant materials have been also reported for a biocidal activity on phytoparasites and soilborne plant pathogens. Essential oils are volatile, natural, heterogeneous mixtures of single substances, mainly terpenes and phenolics, formed as secondary metabolites by aromatic plants belonging to several botanical families. Among terpenes, limonoid triterpenes have been demonstrated to possess interesting insecticidal, nematicidal and antifungal properties. Occurrence of these compounds is mainly limited to Meliaceae and Rutaceae. Alkaloids, phenolics, cyanogenic glucosides, polyacetylenes and polythienyls are further groups of secondary metabolites also known for their biocidal activity and susceptible for the production of natural pesticides. Alkaloids are derived from various botanical families, amongst which the Solacaneae, and include a number of molecules, such as nicotine, veratrine, cevatrine and ryanodine, used as insecticides. Phenolics were found also toxic to insects, fungi, bacteria, nematodes and weeds. Cyanogenic glucosides are amino acidderived secondary metabolites releasing, upon tissue disruption, hydrogen cyanide that suppress insects, fungus, nematodes and weeds. Finally, polyacetylenes and polythienyls, substances mainly present in Tagetes species, are also well known for their insecticidal and nematicidal properties
Biocide plants as sustainable tool for the control of pests and pathoges in vegetable cropping systems
No full textEffetto della salinità sulla crescita e sull'attività fotosintetica del fagiolo (Phaseolus vulgaris L.)
No full textEFFETTO DELLA CONCIMAZIONE AZOTATA E DEL REGIME IDRICO SUL BILANCIO IDRICO E DELL'AZOTO DI UNA COLTURA DI SORGO ZUCCHERINO
No full textEffetto del regime idrico ed azotato sulle perdite e sulle asportazioni dell'azoto in coltura di sorgo zuccherino
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