Weeding is needed before ploughing, soil preparation and seedling planting in rice fields.

In order to better complete the work of agricultural technology popularization, in addition to carefully summing up last year's work and arranging tasks for this year, in order to ensure the increase of crop production and income, on April 6, three scientists and technicians from Kaiyuan seed Management Station went to Longtan Village, Dazhuang Township and Renshou to preach to scientific and technological demonstration households and villagers some requirements for land preparation of high-yield rice fields and pre-seedling weeding and other training. Nearly 60 people participated in the training.

The main results are as follows: 1. The purpose of field tillage and soil preparation is to create a good soil environment for the root growth and development of rice through ploughing, raking, harrowing and other tillage methods, so that rice can quickly take root and absorb water and nutrients quickly, set up seedlings quickly, tiller early, and quickly grow into a high-yield seedling rack, and there are many methods of soil preparation in the field, but no matter which method is adopted for soil preparation, the most important thing is intensive tillage and fine adjustment. Do not leave a dead corner, to plough broken clods, there can be no hard clods in the soil layer. The surface of the field is required to be fine, soft and smooth, and the difference between the height of the field is not more than 4 cm. No matter whether it is dry ploughing or water ploughing, it is necessary to meet the above standard requirements, so as to create a good soil environment for the normal growth and development of rice and lay a good foundation for high quality and high yield.

2. Weeding before rice seedling has many advantages: first, it is simple and convenient to apply pesticide in the field and the speed is fast. Second, the medicine does not have direct contact with the seedlings, which can reduce the drug damage. Third, it can create the best conditions for pesticide application and improve the effect of weeding. The fourth is to seal the weeds in the budding stage, which can effectively control the harm.

3, medication method: 1. Butachlor: with 60% butachlor EC 1.5ml 2.25L per hectare, mixed with 4Mel 5 times water, sprinkle into the field surface during the last process of leveling the field, and disperse the liquid to the whole field by collapsing the flat surface. After 3 days of application, it was planted and sown, and the effective period was 30 mi 40 days. It could effectively control barnyardgrass, other grasses and other annual weeds in the field. 2. Butachlor plus Xicaojing: it has a special effect on broad-leaf weeds such as barnyardgrass, dried cabbage, wild clematis, Hedyotis diffusa and other broad-leaved weeds and sponges. The efficacy period is 35ml for 45 days, 1.5 litres of butachlor EC plus 1.5 kg of Xicaojing wettable powder per hectare, 225,300kg of water, 5cm of field water, evenly sprayed and transplanting seedlings after 8 days.