Semidwarf Winter Wheat Response to Early Spring Clipping and Grazing¹

Abstract

Vegetation removal in early spring by clipping or by grazing was studied in six fields of semidwarf winter wheat (Triticum aestivum L.). Varieties grown were ‘Games’ or ‘Nugaines’ which are common soft white wheat having exceptional stooling and yielding ability. Grazing was started as soon as livestock could obtain adequate feed from the early spring growth and stopped prior to the time the upper node could be removed by grazing. Clipping treatments were applied during this period. Removing vegetation either by clipping or by grazing significantly decreased grain yields. Plant height, heads per square meter, and straw production were reduced by vegetation removal. Increasing the amount of vegetation removed, extending the length of time vegetation was removed, or delaying the starting of clipping or grazing increased the reduction in each of these characters. Clipping simulated grazing of the early spring growth within the limits of humans to estimate when and how much forage to remove to duplicate grazing.

Nitrogen Fertilizer and Seeding Rate Influence on Grain and Forage Yield of Dual‐Purpose Barley

“…Francia et al (2006) reported a 13.5% grain yield reduction for barley after forage removal in southern Italy. Higher degrees of reduction have also been reported (Dann et al, 1983;Pumphrey, 1970). As reviewed by Harrison et al (2012), postdefoliation yield reduction may happen due to several factors, such as frost damage after defoliation, poor leaf area development, delayed maturation, increased rates of green area senescence, and decreased grain filling period.…”

Evaluation Forage Clipping Stages and Different Levels of Nitrogen on Grain and Forage Yields of TRITICALE (× TRITICOSECALE WITTMACK)

“…Delay of clipping at growing season reduce cereal grain yield [8]. It is due to reduction of leaf area, photosynthetic rate and consequently decreases in 1000-kernel weight and spike per square meter [9].…”

“…With delaying clipping vegetative growth reduced and consequently dwarfed plant height. Researchers stated that clipping at different stages of growth in cereal such as wheat and barley reduce 10% plant height [9] [13].…”

Influência de cortes similando pastejo na composição química de grãos de cereais de inverno

“…Os resultados obtidos neste experimento, indicando acréscimo significativo no teor de proteína bruta dos grãos pelos cortes, na média dos cereais, não correspondem claramente aos de Pumphrey (1970 Os teores de fibra bruta dos genótipos analisados não foram afetados (p>0,05) pelos cortes (Tabela 2).…”

“…Estudando o efeito de cortes e de pastejo em trigos de inverno nos Estados Unidos, Pumphrey (1970) observou que o corte no início da primavera não teve efeito consistente no conteúdo de proteína do grão. O conteúdo médio de proteína no grão aumentou levemente em quatro experimentos, e em outros dois experimentos o conteúdo protéico pareceu decrescer com a remoção de vegetação pelos cortes.…”