The current study was developed with the purpose to evaluate the germination and the vigor of Kudzu (Pueraria phaseoloides), Leucaena (Leucaena leucocephala) and Calopog?nio seeds (Calopogonium mucunoides) submitted t...The current study was developed with the purpose to evaluate the germination and the vigor of Kudzu (Pueraria phaseoloides), Leucaena (Leucaena leucocephala) and Calopog?nio seeds (Calopogonium mucunoides) submitted to 0, 6, 12, 24, 48, 72 and 96 hours of testing to natural (in situ incubation) and simulated conditions (in vitro incubation) from the ruminal environment of bovines. For each period of in situ and in vitro incubation, in each kind of seed, the percentage of normal plants was evaluated, as well as abnormal plants, hard seeds, soaked seeds and dead seeds, besides the index of germination speed (IGS). The results were submitted to the Duncan test at a 5% probability. Higher percentages of normal plants were verified in the Kudzu and in the Leucaena kinds, when the seeds were submitted to in situ incubation, as well as the IGS for the three forage species. The Calopog?nio seeds did not turn out to be susceptible of use in the in situ and in vitro incubations. The in vitro incubation revealed to be more harmful to the seeds of the three species used.展开更多
This study was conducted to evaluate the physiological quality of forage seeds after passage through the gastrointestinal tract of cattle, as well as the emergence of seedlings derived from these seeds. Three Fabaceae...This study was conducted to evaluate the physiological quality of forage seeds after passage through the gastrointestinal tract of cattle, as well as the emergence of seedlings derived from these seeds. Three Fabaceae species were used: tropical kudzu, leucaena and calopo. One hundred grams of seeds of each species were offered, separately, to five bovines. After the start of the dispersion, the faeces of the animals were collected every 6 hours, in a total of 72 hours, being taken to the greenhouse immediately after each collection. The study evaluated the total number of seedlings in the stool, the lengths of roots and aerial parts, as well as the natural and dry seedling weight thirty days after the disposal of the faeces in the greenhouse. The experimental design consisted of randomized blocks, with twelve treatments (sampling periods) and five replications (cattle). The best performance for the total number of seedlings in the faeces of cattle was observed in the kudzu species. The length of the root, length of the aerial part and dry matter seedling weight was observed in the leucaena species, followed by kudzu. The calopo showed low results for all variables due to the high degradation of the seeds.展开更多
文摘The current study was developed with the purpose to evaluate the germination and the vigor of Kudzu (Pueraria phaseoloides), Leucaena (Leucaena leucocephala) and Calopog?nio seeds (Calopogonium mucunoides) submitted to 0, 6, 12, 24, 48, 72 and 96 hours of testing to natural (in situ incubation) and simulated conditions (in vitro incubation) from the ruminal environment of bovines. For each period of in situ and in vitro incubation, in each kind of seed, the percentage of normal plants was evaluated, as well as abnormal plants, hard seeds, soaked seeds and dead seeds, besides the index of germination speed (IGS). The results were submitted to the Duncan test at a 5% probability. Higher percentages of normal plants were verified in the Kudzu and in the Leucaena kinds, when the seeds were submitted to in situ incubation, as well as the IGS for the three forage species. The Calopog?nio seeds did not turn out to be susceptible of use in the in situ and in vitro incubations. The in vitro incubation revealed to be more harmful to the seeds of the three species used.
基金“Research Support Foundation of the State of Rio de Janeiro”(FAPERJ).
文摘This study was conducted to evaluate the physiological quality of forage seeds after passage through the gastrointestinal tract of cattle, as well as the emergence of seedlings derived from these seeds. Three Fabaceae species were used: tropical kudzu, leucaena and calopo. One hundred grams of seeds of each species were offered, separately, to five bovines. After the start of the dispersion, the faeces of the animals were collected every 6 hours, in a total of 72 hours, being taken to the greenhouse immediately after each collection. The study evaluated the total number of seedlings in the stool, the lengths of roots and aerial parts, as well as the natural and dry seedling weight thirty days after the disposal of the faeces in the greenhouse. The experimental design consisted of randomized blocks, with twelve treatments (sampling periods) and five replications (cattle). The best performance for the total number of seedlings in the faeces of cattle was observed in the kudzu species. The length of the root, length of the aerial part and dry matter seedling weight was observed in the leucaena species, followed by kudzu. The calopo showed low results for all variables due to the high degradation of the seeds.
