The influence of sowing date, harvest date and seed rate on the yield of forage peas

Abstract

A series of preliminary trials is described to assess the potential and some of the cultural requirements of new cultivars of forage peas grown as pure stands in the west of Scotland. Optimum sowing date was late March for harvesting 15 weeks later to leave sufficient of the growing season for a catch crop or the establishment ofa grass sward. Yield of dry matter (DM) at harvest was approximately 6 t ha~' but DM concentration varied greatly with season. The digestibility of the organic matter was of the order of 0-700 and the crude protein concentration in the DM 170 g kg"'. DM yield increased with increasing seed rate up to 200 kg ha~'. the maximum rate tested.

Legume-cereal forage mixtures for silage 2. Nutritive value of silage for dairy cows

“…Dry matter content in silages from maize was also low, this being characteristic for the region due to high air humidity, frequent fogs and rainfall at the end of September and beginning of October. A similary low dry matter content was described for silages from pea grown in pure culture under British conditions (Potts, 1980(Potts, , 1982. The reaction and level of acids in silages from whole cereals or their mixtures with grasses was similar (Kung et al, 1990;Walker et al, 1990).…”

“…Moreover, no significant effect of variety on nutritive value of forage from pure cultures of pea grown for silage in the soil and climatic conditions of Scotland was found (Potts, 1980(Potts, , 1982. Dry matter yield and nutritive value of the mixtures and of pure cultures of pea depend above all on maturity and growth season, determined by amount and distribution of rainfall and temperature of the air (Potts, 1982;Aman P., Graham H., 1987;Urbanski and Brzoska, 1996a).…”

Effects of Row Spacing and Seeding Rate on Hay and Seed Yield of Eastern Anatolian Forage Pea (Pisum sativum ssp. arvense L.) Ecotype

“…Previous researches recommend row spacing for peas as 15-60 cm based on the purpose of production and ecological conditions (Senel, 1958;Johnston et al, 2002;Bozoglu et al, 2004;Inanc, 2007). Seeding rate may sometimes reach 20 kg ha -1 (Potts, 1980).…”

Legume-cereal forage mixtures for silage 1. Effect of pea variety, maturity and sowing density of mixture on dry matter yield and silage chemical composition

“…The yield of home varieties of pea grown for green forage is about 5.51, but for some varieties can exceed 7 t DM per ha (Wiatr, 1989). Although no significant effect of pea variety on mixture yield was found, both domestic (Wiatr, 1989) and foreign (Potts, 1980) studies point differentiated yields of varieties cultivated in pure culture for green forage. Our results also indicate that mixture sowing density does not significantly affect DM yield, which may be of importance for costs of mixture cultivation.…”

“…The problem of the growth and ensiling of whole cereal plants is well known (Kirchgessner et al, 1989;Bergen et al, 1991;Michna and Poloczek, 1993). Studies have also been conducted on the growth of pea plants for silage but because of the lodging of the plants and losses during harvest the species has not found practical use (Brundage et al;1979, Potts, 1980, 1982Faulkner, 1989;Stryk, 1990). An agrotechnical factor enabling the growth of pea plants for silages is the use of spring crops as a support for pea plants.…”