If Putian or Waseda farmland has accumulated water for a long period of time, or if the water quality is unclean, or if the soil is too fertile, or if more unripe organic fertilizers are used, it may be easy to induce moss growth in the rice fields. Moss not only competes with rice for fertilizer, but also impedes the ventilation and ventilation of paddy fields. It also reduces the water temperature and affects the growth and development of seedlings and early rice.
Prevention of moss in paddy fields and early rice fields is mainly based on the method of draining the fields to make the moss dry. Or in the cultivator when the moss is stuffed into the mud, and then take the ground row diligent irrigation, dry and wet alternate, so that the moss can not see the sun, the algae can not photosynthesis and cause its death. Pay attention to keeping the field in Putian clean, apply planting ash to the planter, and apply planting and grey water in the planting stage, that is, 4 to 5 kilograms of plant ash per 667 square meters (1 acre), watering 250 to 300 kilograms, and spraying ash. Alkaline, strong alkaline properties cause moss to die, causing the moss to disappear. Or use 15 to 20 kilograms of tea dry powder per 667 square meters, and apply it when plowing the rice fields to increase the alkalinity of the soil so that the moss suitable for the acidic environment cannot grow. Or use fresh eucalyptus leaves (or maple leaves) 150-250 kg per 667 square meters of paddy field, chopped and spread in the field, keep 1.5 to 3 cm of water, so that the leaching of plant alkaloids to kill the moss. The above method can receive good results.
In recent years, with the changes in the rice cropping system, direct seeding rice, machine-planting rice, and transplanted rice have coexisted in various forms, and large-scale planters have emerged. Although some soil methods for controlling moss have certain effects, they are effective in prevention and control. Control is far less than the use of chemical control. In the past, copper sulfate was a common agent for controlling moss in paddy fields, but improper use may have a poor kill effect. Excessive use of copper sulfate may also cause damage to seedlings and early rice. Therefore, it is very important to choose the right chemical agent. At present, there are the following pesticides that can be used to control moss in Putian and Zaoji. The first is moss net. The drug contains 10% triphenylacetate, 10% copper sulfate, 25 to 30 grams of 667 square meters, and 35 to 40 kilograms of watered. The second is Rice Star. It is an efficient, broad-spectrum rice field herbicide and has good control effects on annual grass weeds, Cyperaceae weeds, broadleaf weeds and some perennial weeds. At present, 80% Ricestar water dispersible granules are used to control moss in rice fields. Generally used toxic soil method, single-use, 667 square meters with pure medicine 4.8 grams; mixed, 667 square meters with pure medicine 4.8 grams, can be added when the farm 2 to 3 grams or grass Buster 1 to 1.5 grams, keep field water when spraying Layer 3 to 5 cm, at least 5 days after application. The third is Bailu enemy (45% triphenylacetate tin wettable powder). For the prevention of moss in paddy fields, poisonous soil method is generally used, with 31.5 to 33.7 grams per 667 square meters with Bailuoyi, 30 to 40 kg of dry fine soil, evenly spread. The fourth is butachlor. 667 square meters of butachlor emulsion 150 grams, watered 30 to 35 kg spray, the effect of good control of moss.
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