During fruit ripening normally watch on lower leaves yellowing edges. If the temperature is off scale for 30 ° C, the process goes on – on the leaves already appear “edge burn”, ie leaf tissue at the edge becomes brown and wither. There could be brown spots all over the leaf between the veins. Should not be afraid – it does not blight. Plants lacking potassium, and the need for this element of power with the growth of fruit growing. Potassium salt “flowing” to the fruits and young leaves of the old lower leaves, and the last die.
But potassium in the soil enough – to make a hole potassium sulfate on landing and has managed to make two feeding. She found an explanation of this phenomenon. At midday the temperature at the surface of the soil rises to 60 … 70 ° C, and when overheating the roots lose their ability to absorb potassium from the soil solution. Here’s why need mulch. Quickly helps the plants in this case, the foliar (I’ll call her plate). With the shortage of potassium fruits grow in small, pale-, sour taste. Potassium provides accumulation in fruit sugars, vitamins, lycopene – an antioxidant with a protective function.
At the root feeding of fertilizer “eliminated” from the available plants, nutrient solution, going deep into the soil or irrigated with rainwater, or transformed into soluble compounds. Root feeding with chemical fertilizers destroy soil structure, suppress the activity of beneficial soil microflora. Feeding can cause burns and even death of roots of cultivated plants, especially at high concentrations or when you make a sufficient soil moisture. If you make a nutrient solution through the leaves of these adverse effects do not occur. In this plant efficiently and quickly assimilate food, and in that moment when they need it.
For best effect you should use a fully water-soluble complex fertilizers containing major nutrients except for trace elements in chelate form and humic substances. The combination of stimulants with growth raises defenses of plants and reduces stress in extreme conditions – during the cooling or heat waves.
Tomatoes is very much needed micronutrients, but they are well assimilated only at entry through the leaves. Last season I spend at least four leaf fertilizing, timing them to the following terms: after pricking seedlings, a few days before the landing of plants for a permanent seat, before the formation of ovaries, in ripening period of fruits. Of course, leafy additional forage ¬ ki reasonably combine with the root, decreasing in the recent concentration of the nutrient solution.
When the sheet making nutrients quickly spent, the root system is activated to absorb nutrition from soil. And if the soil is not enough? It is better to combine both types of dressings.
One can not overestimate the dose of fertilizer, indicated on the labels and instructions. Better not supplementing than overfeed, especially when making nitrogen fertilizers and concentrated organic (chicken manure), which can cause nitrate accumulation in the fruit. Dry fertilizer is better to make a landing (fall, spring – the hole, in rows) with the expectation of their continued use.
Plants easily absorb food from infusions of herbs. They are richer in composition than the complex fertilizers because they contain vitamins, and phytohormones, and volatile production.
Foliar spray of doing better, which gives fine-atomization. Should be wetted and the upper and lower leaf surfaces. The solutions are absorbed through the stomata – there are more bottom sheet.
The best time for treatment – early morning, when cool, ie, solution for a long time does not dry on the leaves, and all the stomata are open (at midday and at nightfall they are closed).
Combined use of leaf and root fertilizing guarantees good yields of quality fruit.