At present, rice in the northeast region has entered the heading stage, and the corn is in the flowering and pollinating period, and the growth is generally normal. However, it should be noted that from the mid-May to the early June, the effects of low temperature, rain and rain, the crop growth is slow, the growth period is delayed, and the field growth is uneven. In addition, there are many recent precipitations, and there are many foggy weathers, which are highly prone to rice blast. To this end, the Ministry of Agriculture rice and corn expert guidance group proposed that all regions should strengthen field management according to crop growth and development, promote safety and maturity, and fully seize the harvest of autumn harvest.
The first is to prevent pests and diseases. At present, rice pests and diseases are entering a high-risk period, and the incidence of leaf mites in the Sanjiang Plain has reached 7 levels. The incidence of leaf blast in Liaoning is 3-5 days earlier than normal, and it is easy to upgrade to ear-neck. All localities should strengthen monitoring and early warning, timely release information on pests and diseases, and carry out pest control early. For susceptible varieties and paddy fields in the susceptible period, the drug was controlled twice at the beginning of heading and at the end of heading. Do a good job in the prevention and control of second-generation corn borer, big spot disease and head smut, and timely remove the silk smut strain in the field and bring it to the field for burial.
The second is to promote precocity. The delay in crop growth in Northeast China this year has increased the risk of early frost exposure. Corn should be topdressed at the right time, spraying foliar fertilizer such as potassium dihydrogen phosphate, taking measures such as cutting off unsuccessful empty stalks and diseased plants, destroying dead bottom leaves, removing weeds, etc., avoiding nutrient and water inefficient consumption, and improving Field ventilation and light transmission capacity. According to plant growth and leaf color depth, rice should be reasonably determined the amount and time of application of panicle fertilizer, and foliar fertilizer such as potassium dihydrogen phosphate should be sprayed from the heading stage to the filling stage to accelerate the grain filling rate and increase the seed setting rate.
The third is anti-early cream. Corn should be properly stalked and dried in a timely manner to accelerate the dehydration of the booting and grain, reduce the water content of the grain, and promote the early maturity of the corn. For some late-ripening rice, it is necessary to adopt irrigation measures to prevent frost, evening irrigation, and daytime drainage to keep the field moist. It is necessary to prepare the materials and technology for preventing early frost early. Once the early frost occurs, the grassroots cadres and masses will be quickly organized to carry out artificial fumigation and frost prevention in time to effectively reduce the effects of early frost.
The fourth is to prevent lodging. Due to the low temperature in the early stage, the amount of fertilizer applied to some fields is too large, and the plants grow vigorously, and the possibility of lodging is greater. Where there is a habit of applying fertilizer, it is necessary to reduce or increase the application of potassium fertilizer according to the growth of the fertilizer, increase the potassium fertilizer, and increase the lodging resistance of the plant.
The fifth is to prevent autumn drought. The meteorological department predicted that there will be less rainfall in the northeastern region in August and a drought in the northeastern region. It is necessary to pay close attention to weather changes, prepare materials and technologies for preventing drought and autumn hoists, and early repair and repair of drought-resistant machinery and equipment, and do a good job in dispatching and supplying materials such as electricity and diesel. For the old dry areas, it is necessary to seize the favorable opportunity of more recent precipitation, save water as much as possible, store enough water, and increase the emergency water source for drought relief. The flowering and pollination period of corn is the critical period of water demand. In case of severe drought, it is necessary to find ways to irrigate in time to meet the water demand and prevent drought due to drought.
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