The platinum is a multi-year crop that, at the beginning of the winter spring, grows old, yellow and dormant on the ground, but underground roots continue to operate and accumulate nutrients, seizing this period to strengthen field management and lay the foundations for high, stable and high-quality production in the coming year。
We'll re-feat the winter
After the fall harvest, winter fertilisation is repeated to meet the growth needs of underground roots. After the fall harvest, the dead female was removed and removed from the field and burned. Two winter fertilisations, mainly organic fertilizers, are carried out in the form of 1,000 to 2,000 kg of soil per acre, 100 to 200 kg of phosphorus per acre, 20 to 30 kg of ammonium carbonate, with peanut cakes, bone powder, etc., after full fermentation, in the form of ditches or caves at the edges, with minimal storage of damage when digging in a ditch。
An additional application of fertilizers in the spring, with a combination of 20 to 31 kg per acre, 2 to 3 kg of boron or potassium phosphate, or urea mixed with potassium chloride or 50 to 60 fertilisers per acre, is used to promote the production of soil from the plume. Every fertilization must be followed by a watering exercise and one in six to seven days during the dry season。
Clean garden disinfection
The “long cold” to the “long spring” saw the thawing of the plant, the subsequent removal of the plant, the thorough cleaning of the plant's tubs, leaves, dead branches, weeds, etc., the removal from the fields and the burning of the garden and surrounding weeds, and the eradication of the winter parasites and pathogens。
After the first fertilizer, which can properly remove the ground from the plant base until the second fertilisation, it is usually after the `eternal spring' (when the top of the plant has been completely defunct), using the weather to purify all the soil, not to damage the sprouts of the base and to remove the residues from the ground, to fertilize the whole garden with 3 kg of earthworms per acre for 1 to 2 days, or spray the soil and root with 40% of aluminum, to eliminate the winter disease, reduce the disease base number, reduce the occurrence and prevalence of the disease in the coming year and then cover 5 to 6 centimetres of sand. Acidic gardens can be distributed between 50 and 75 kg of raw lime per acre to moderate and soil acidity。
Clear the gutter
The roots of the platinum are flesh and, if the soil is overwatered, prone to freezing in winter or to root decomposition, both affect its production and reduce its quality. Therefore, it is necessary to clear trenches in a timely manner and lower the groundwater table in order to prevent the occurrence of stains and root causes。
Prevention and control of pests and diseases
The main pests during the winter of thorium are stasis and aphids, tigers, etc. Stereosis is combated by cleaning canals, lowering groundwater tables, applying less nitrogen fertilizer, increasing phosphorus and soil fertilizer, while treating 70 per cent of methyl tobuzin or 50 per cent of the more than 600-800-fold liquid spray. Aphids can be sprayed with 50% thiophos-methyl emulsion 1,000 times the fluid, or 10% thiram humid powder 1,000 times the fluid. Tigers can be combated by baits, grass-traps or manual capture。
