Rape enters the early spring field tube stage, due to improper fertilization during planting and transplanting or lack of a certain nutrient elements in the soil, causing poor growth of rapeseed, if not promptly taken remedial measures, it will affect the yield.
In the absence of nitrogen in nitrogen-deficient rapeseed, the leaves are yellowish, weak in growth, and the plants are short. In general, nitrogen deficiency and red leaves are prone to occur when drought and fertilizer are released.
Remedial measures apply 7.5 kg of urea per acre, or 15-20 kg of ammonium bicarbonate to 500-700 kg of water.
Phosphorus-deficient rape plant lacks phosphorus, which grows slowly and dwarfs, leaves become smaller, leaves thicken, dark green or gray-green leaves, lack of luster. Petiole purple, purple veins spots or plaques. The leaves were 2-3 fewer than the normal plants, and the bolting was slow and the moss color was red.
Remedial measures 25-30 kg of superphosphate per acre, or 2-3 consecutive applications of potassium dihydrogen phosphate.
The shortage of potassium in rapeseed begins with the old leaves and develops towards the new leaves. The yellow spots appear initially. The "focal edges" and the pale brown spots gradually appear at the tips of the leaves and leaves, and the leaves become thicker, harder, and more brittle. The organization was apparently "burned" and wilted. These tissues remain brown after they die.
The remedial measures are to apply 7.5 to 10 kg of potassium chloride to 500-700 kg of water per acre, or to mix in 100 to 150 kg of ash.
Boron-deficient rapeseeds have a large demand for boron fertilizer, but the amount of boron in the soil is less, so rape is most likely to lack boron. The boron-deficient plant roots ceased to grow, with no root hairs and lateral roots, some with small nodules, and the root bark turning brown. Purple patches or blue-purple patches appeared on the leaves, leaf margins were recurved, and rhizomes were enlarged. Boron deficiency during flowering will appear "flower but not real", which means that after flowering, there is no scarring.
Remedial measures 150-200 grams of borax with 150-200 kilograms of water per acre, or 50-100 grams of borax and 50 kilograms of water in the sunny afternoon foliar spray.
Greenhouse Hardwares
Greenhouse Cross Connectors are used to tie together two piece of pipe in the greenhouse structure or other application.
Hoop Size: 1-3/8", 1-5/8", 2" [1-7/8" O.D], 2-1/2" [2-3/8" O.D.] Purlin Size: 1 3/8", 1-5/8"
Material: Aluminum Alloy Or Galvanized Steel
Each set includes two Clamps with two Bolts and Nuts
Be used for: Purlin to rafter connections. Trellis system for grapes and other vines. Shade and wind barrier frames.
Cross Connects - Purlin Clamps for Greenhouse Pipe Connectors Tube Brackets Meta
Greenhouse Cross Connectors (purlin brackets) can be used to connect ridge poles or purlins to bows. These steel greenhouse connectors are ideally sized for 1 5/8" top rail fence piping.
Greenhouse Hardware,Greenhouses Purlin Bracket,Greenhouse Cross Connectors,Greenhouse Aluminum Purlin Clamp
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