900 g DM m-2).. There are cultivars of B. pelecinus, O. compressus, T. michelianum, T. resupinatum and T. vesiculosum which presents high yield in both seed and phytomass, small size of seeds, high seminal hardness and high rate of reproductive effort, important attributes for plants that will be introduced in highly fluctuating environmental conditions and soils thatwith present severe limitations.]]>
1 m), with a light texture. The productive performance of a collection of annual fodder legumes was evaluated: six cultivars of Ornithopus compressus, one accession and one cultivar of Ornithopus sativus, one cultivar and two accessions of Biserrula pelecinus, and one cultivar for each one of the following species: Trifolium michelianum, Trifolium resupinatum, Trifolium vesiculosum and Medicago polymorpha. Subterranean clover (Trifolium subterraneum var. subterraneum) cv. Mount Barker was used as a control. In a three year period T. vesiculosum stood out for having high biomass production, mainly in the third year (more than 4 t DM ha-1 yr-1), appropriate persistence, good nodulation and tolerance to low winter temperatures. O. compressus, appeared to be a new alternative fodder with excellent adaptation and high production potential, in particular, the late maturing cycle cvs. Avila, Pitman and Madeira, presented consistently high biomass yields (approximately 4 t DM ha-1 yr-1 in the third evaluation season). One cultivar and two accessions of B. pelecinus had low levels of production (less than 1 t DM ha-1 yr-1) in the three years. Similar performance was shown by M. polymorpha, T. michelianum, O. sativus and T. resupinatum, not having a production level and persistence superior to the control over the years.]]>
13°C) for 30 days, and later grown in a heated greenhouse with 8, 10, 12, 14 or 16 h of photoperiod. In the field, days from emergence to bulb initiation and to maturity were evaluated in 13 clones planted on six sequential planting dates. Percentage of bulbing increased and the number of days from emergence to bulb initiation decreased, as storage temperature decreased and duration of storage increased. Plants of studied clones did not form bulbs with photoperiods of 8, 10 or 12 h with any storage temperature. All plants of both clones formed bulbs when photoperiod was over 14 h and storage temperature was 4 or 7ºC. A reduction on the period emergence-bulb initiation was observed as planting date was delayed from April to September.]]>
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