Brassica Reference Manual - Agricom

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1. INTRODUCTION 1. Introduction 1.5 Why consider brassicas? Brassica crops can offer a superior feed supply (both in terms of quantity and quality) in many situations. They provide an excellent source of energy and protein for grazing stock. The following table highlights the value of the Brassica-Herb system, which is outlined on page 16. Table 1. Energy measurements of some PGG Seeds’ brassicas and herbs (26/9/2005). 3 First grazing 7/12/04 Feed on offer at first grazing - the brassica content dominating ME Content (MJME/kgDM) Example of a multiple grazing Brassica-Herb system McKillops property, Kiewa Valley, NE Victoria. Using a brassica crop should be considered in any situation where pasture quantity or quality is limiting the potential production of your livestock. The most common situations are as follows: Young stock finishing in early summer - feed for post weaning period, where feed demands increase at a time when vegetative pasture growth rates are falling. Mid-late summer feed for all stock classes - at a time when pastures are of low quality and low moisture levels are impacting on pasture growth. Summer "safe" feed - a parasite/pathogen free grazing environment. Autumn feed - to support an increasing stocking rate resulting from the removal of paddocks in rotation for pasture renewal and filling the feed gap when kikuyu becomes dormant and before grazing of annual ryegrass. ENERGY MEASUREMENTS Crude Protein ( %) Third grazing 25/3/05 Digestibility ( %) Grouse Chicory 11.63 30.8 80.18 Graza Forage Brassica 10.96 28.0 76.25 Tonic Plantain 11.97 32.1 82.18 Hunter Forage Brassica 11.21 27.3 77.72 Feed on offer before the third grazing - the herb component making up a significant proportion of regrowth Winter feed - maintenance feed for stock when pasture growth is limited, allows building of pasture cover reserves by holding stock on small areas, allows pastures across the farm to build up for valuable, high quality, early spring feed, and to avoid widespread pasture damage in very wet conditions through pugging. Winter stock finishing - large quantities of quality feed suitable for finishing. For example, cattle and winter lamb contracts. Break crop for renovation programme of sub-standard pastures - if managed, will provide a significant dry matter contribution, minimal time out of production, useful system for assisting in weed and disease clean up pre pasture establishment, and a good opportunity for improving the soil fertility status.
1. Introduction 1.6 Product Range GRAZA Forage Brassica MULTIPLE GRAZING BRASSICAS Early maturing (10 -12 weeks), multiple grazing, summer, autumn and winter feed, for all stock types. Improved alternative to non-certified Rangi rape with 90-100 days to maturity. Higher yielding than Rangi rape. Fast growing (6-8 weeks to first graze), multiple grazing, for stock finishing in fertile, summer moist areas. Graza is a uniquely smooth-leaved, low crowned and late-flowering forage brassica. It requires minimal ripening (50 days or 6-8 weeks). ........................................................................................... Rival TURNIP SINGLE GRAZE BRASSICA OPTIONS 12-14 weeks to mature, summer turnip, bred for increased tolerance to drought and Diamondback moth. Certified alternative to Mammoth Purple Top turnip. Early maturing (12-14 weeks), tankard bulb, short term, one graze, summer crop. White fleshed, purple skinned, full leaved, 16+ weeks to maturity, bred for improved virus and disease resistance and yield potential over York Globe. Medium tall kale, high yield potential, high leaf: stem ratio, excellent utilisation rates for valuable winter feed, limited use in most areas. Yellow fleshed, main crop swede, valuable keeping potential, favourable culinary taste, stock maintenance through winter, limited use in most areas. ........................................................................................... COMPANION SPECIES WITH BRASSICAS Mineral rich perennial herb, fast establishing, strong year round production, grow with multiple grazing brassicas and pastures to boost overall production and diet quality. A longer-rotation cultivar, bred to provide high dry matter production, improved cool-season growth and recovery after grazing. Preferred chicory variety to use in mixes with perennial grasses. Cool season active, summer productive, high quality component in permanent pastures or specialist short term crop pastures. Fine stemmed, dense tillering, early-mid flowering, and good tolerance to heat and drought. Good cool season production, grazing type. Upright growing and high yielding. High levels of natural reseeding, bred for persistence and reduced levels of formononetin. 4 1. INTRODUCTION
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