Factors Affecting Nutritive Value of Corn and Sorghum Silage

Owen, F.G.

doi:10.3168/jds.s0022-0302(67)87435-6

Cited by 36 publications

(24 citation statements)

References 24 publications

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“…Por outro lado, Owen (1967) não reportou diferenças quanto ao ganho de peso de novilhos alimentados com sorgo de baixa e alta relação de grãos/colmo ou sorgo de duplo propósito.…”

Section: Introductionunclassified

Características agronômicas e composição química de oito híbridos de sorgo [Sorghum bicolor (L.) Moench]

et al. 2003

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RESUMO -O experimento foi conduzido com o objetivo de avaliar as características agronômicas, composição química das frações e da planta inteira de oito híbridos de sorgo, semeados em março de 2000, no sentido de contribuir para os programas de seleção de germoplamas resistentes aos efeitos das estiagens prolongadas e, ao mesmo tempo, apropriados ao processo de ensilagem. Utilizou-se o delineamento em blocos ao acaso com oito tratamentos e três repetições, para avaliar os híbridos AG-2005, BR-700, MASSA-03, 498111, 65E3, 698005, 698007 e 699005. Não houve diferenças significativas entre produção de matéria seca (PMS) e proporção de folhas dos híbridos avaliados. A maior proporção de colmo (41,3%) foi observada no 498111 e a menor no 9%). O híbrido 65E3 apresentou a maior proporção de panícula (43,2%) e o 498111 a menor (28,9%). Quanto à composição química da planta inteira, não foram observadas diferenças significativas entre os híbridos quanto aos teores de matéria seca, matéria mineral, hemicelulose, nitrogênio insolúvel em detergente neutro, nitrogênio insolúvel em detergente ácido e nutrientes digestíveis totais (NDT). Os teores de proteína bruta variaram de 6,5 a 8,8%, fibra em detergente neutro de 57,0 a 70,3%, fibra em detergente ácido de 29,8 a 36,2%, celulose de 25,3 a 31,2% e lignina de 3,6 a 5,5%, sendo estatisticamente diferentes entre os híbridos. O 699005 apresentou o maior teor de carboidratos solúveis (14,5%), diferindo estatisticamente apenas do híbrido 698007 (9,6%). Os híbridos também mostraram diferenças na composição química das frações folhas, colmo e panícula. De forma geral, todos os híbridos apresentaram teores de matéria seca e carboidratos solúveis adequados ao processo de ensilagem. As produções médias de matéria seca dos híbridos (6,2 t/ha), foram altas considerando-se a baixa precipitação ocorrida durante o período experimental. A análise de Cluster sugeriu o agrupamento dos híbridos de maior PMS e menores porcentagens de panícula e NDT e híbridos de menor PMS, porém com maiores porcentagens de panícula e NDT. Palavras-chave: carboidratos solúveis, produção, composição morfológica Agronomic Characteristics and Chemical Composition of Eight Sorghum Hybrids [Sorghum bicolor (L.) Moench]ABSTRACT -This research was developed to evaluate the agronomic characteristics, chemical composition of the whole plants and their fractions of eight sorghum hybrids, to identify the adapted plants to dry environmental conditions and appropriated to silage production. The experiment was conducted according to a randomized block design, with eight treatments and three replications, to study the commercial hybrids AG-2005, BR-700 and MASSA-03, and the non commercial hybrids 498111, 65E3, 698005, 698007 and 699005. There were no significant differences among hybrids in relation to the plant height, dry matter production and leaf proportion, it was observed highest stem content (43.3%) in the 498111 hybrid and lowest in the MASSA-03 (29.9%). The 65E3 showed highest panicle contents (43.2%), however the low...

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“…Por outro lado, Owen (1967) não reportou diferenças quanto ao ganho de peso de novilhos alimentados com sorgo de baixa e alta relação de grãos/colmo ou sorgo de duplo propósito.…”

Section: Introductionunclassified

Características agronômicas e composição química de oito híbridos de sorgo [Sorghum bicolor (L.) Moench]

et al. 2003

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“…Because a high grain content in maize silage has frequently been associated with better quality (Owen 1967;Eddowes 1969;Montgomery et al 1974), silage crops grown in New Zealand have been traditionally established at relatively low populations (about 80 000 plants per hectare) to maximise grain production. This study has shown, however, that a significant increase in total DM yield per hectare at the 'hard dent' stage is possible by increasing the established population up to 166 000 plants per hectare (Table 4a).…”

Section: Discussionmentioning

confidence: 99%

“…Since the yield:plant population relationship for total DM is asymptotic and for grain DM is parabolic (Holliday '1960;Bunting 1971;Downey 1971), the grain content of silage will be reduced if plant population is increased to give maximum total DM yield. A high grain content is considered an important determinant of the feeding value of maize silage for cattle (Owen 1967;Eddowes 1969; Montgomery et al 1974); it is therefore generally recommended that maize be grown at low plant population densities. However, recent English work (Bunting & Gunn 1974;Bunting 1975Bunting , 1976Phipps 1975;Phipps & Weller 1976, 1979McAllan & Phipps 1977;Phipps et al 1979) suggests a need to reappraise the importance of grain content as a determinant of the feeding value of silage.…”

Section: Receh'ed 23 October 1980; Revision 13 March 1981mentioning

confidence: 99%

Effect of plant population and time of harvest on yield and quality of maize (Zea maysL.) grown for silage

Thom

Dorofaeff

Dyson

1981

New Zealand Journal of Agricultural Research

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Maize (hybrid PX61O) was sown at 85000 (Treatment 1), 181000 (Treatment 2), and 362 000 (Treatment 3) seeds per hectare in large plots (1.0 ha in 1975-76; 0.5 ha in 1976--77). In 1976--77 (Year 2) deaths of maize plants were greatest during the first 110 days growth and amounted to 10, 11, and 24% of established seedlings for Treatments 1, 2, and 3, respectively. Total dry weight per plant, the proportions of leaves, stem, grain, cob, and tassel, and the concentrations ofN, P, K, Na, Ca, and Mg, were assessed at intervals until the 'hard dent' growth stage (30-35% total plant DM), about 160 days from sowing. High plant population densities had little effect on mineral concentration, but reduced total dry weight per plant and reduced the weight of individual shoot components, especially leaves, stems, and grain. For Treatments 1,2, and 3 respectively in Year 2, grain represented 38,28, and 21% of plant dry weight at 144 days from planting and 49, 43, and 33% of plant dry weight at 167 days from planting. At the 'hard-dent' growth stage in 1975-76 (Year 1), sampling estimates of DM yield per hectare of 21.3, 27.4, and 36.1 t.ha-1 for Treatments 1, 2, and 3, respectively, were 12, 38, and 68% greater than yields measured by harvesting whole plots. In Year 2, yield estimates of22.0, 25.0, and 24.4 t.ha-1 of DM for these treatments were 8, 14, and 4%, respectively, above yields measured by total harvest. The optimum plant population for maize silage, the growth and development of maize grown at different plant populations, the quality of the crop at ensiling, and problems encountered in accurately sampling large plots of maize for estimation ofDM yield per hectare are discussed.

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“…Forage dry-matter content is widely believed to affect animal performance as well as losses of dry matter from the silo. Surveying published results from feeding trials with sheep and cattle, Owen (1967) and Gunn (1975) concluded that dry-matter intake by the animal is positively correlated with dry-matter content of the forage up to a dry-matter content of c. 35 %, beyond which the relationship is reversed. The influence of forage dry-matter content upon other animal performance traits is less well defined but appears to be greater on milk than on meat production.…”

Section: Forage D R Y -M a T T E R C O N T E N Tmentioning

confidence: 99%

Breeding forage maize varieties for Britain

Gunn¹

1977

Annals of Applied Biology

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Factors Affecting Nutritive Value of Corn and Sorghum Silage

Cited by 36 publications

References 24 publications

Características agronômicas e composição química de oito híbridos de sorgo [Sorghum bicolor (L.) Moench]

Características agronômicas e composição química de oito híbridos de sorgo [Sorghum bicolor (L.) Moench]

Effect of plant population and time of harvest on yield and quality of maize (Zea maysL.) grown for silage

Breeding forage maize varieties for Britain

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