ANIM2501 Lecture Notes - Lecture 9: Canker, Leucaena, Subtropics
Tropical/ Subtropical Legumes
1. Round leaf Cassia
Strengths
- Rapid establishment and spread
- Low fertility demand
- Adapted to acid soils
- High sed yields
Limitations
- Low palatability
- Poor drought tolerance is ungrazed
- Susceptible to anthracnose in the south american savannas
2. Butterfly Pea
Strengths
- Easy to establish, including on heavy clays and surface crusting soils
- Useful ley legume
- Palatable and high nutritional value
- Good for fertility restoration
- High forage and seed production
- Moderate tolerance of salinity and sodicity
Limitations
- Requires moderate fertility soils
- Requires careful grazing management for persistence
- Generally requires replanting every 5-8 years due to increasing dominance of invading
grasses
3. Leucaena
Strengths
- High nutritive quality for ruminant livestock
- Very digestible
- Tolerant of prolonged dry periods and retains leaf into dry
- Produces multiple products in a wide range of farming system
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Susceptible to anthracnose in the south american savannas: butterfly pea. Easy to establish, including on heavy clays and surface crusting soils. Generally requires replanting every 5-8 years due to increasing dominance of invading grasses: leucaena. Tolerant of prolonged dry periods and retains leaf into dry. Produces multiple products in a wide range of farming system. Poorly adapted to acid, infertile and waterlogged soils. Poor growth at low temperatures and is susceptible to frosting. Relatively weak in seedling stage and slow to establish. Mimosine and condensed tannins (toxin produced) limit use for non-ruminant livestock. (need to introduce bacteria into gut system to combat it) Subtropical/temperate legumes: white clover (most major one) Some australian cultivators have relatively high heat tolerance. Requires neutral ph and high p soils. *where there s high rainfall, you should find (cid:449)hite clo(cid:448)er: lucerne. Ability to extract water from deep soil layers. Wide range of climatic adaptation: warm, temperate, climates and subtropics.
