油菜 - Discolouration
症状
Dark green, older leaves show a reddish/purple discoloration.
原因
Phosphorus deficiency
油菜 - Discolouration
症状
The older leaves show a distinct reddish/purple discoloration along the marginal area. The entire leaf blade shos a faint reddish tint.
原因
Phosphorus deficiency
油菜 - Discolouration
症状
Older leaves show a distinct reddish/purple discoloration along the marginal area. The entire leaf blade including the veins shows a reddish tint.
原因
Phosphorus deficiency
油菜 - Discolouration
症状
Older leaves show a distinct reddish/purple discoloration along the marginal area. The entire leaf blades including the veins show a reddish tint, as well as the leaf stalks.
原因
Phosphorus deficiency
Phosphorus deficiency使变得更糟
- Acidic or very alkaline (calcareaus) soils
- Low organic matter
- Cold or wet conditions
- Crops with a poorly developed root system
- Soils with low P reserves
- Soils with a high phosphate capacity
- Iron rich soils
磷很重要
- Improved crop establishment
- Improved winter hardiness
- Improved yield
对于磷雅苒推荐的产品是
YaraVita MAGPHOS K
Oilseed Rape: For a single application, 5 l/ha at onset of stem extension. For moderate deficiency, 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Water rate: 200 l/ha
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