It is understood that since mid-May, especially in early June, due to adverse weather conditions such as low temperature, high precipitation, and low sunshine hours, at present, except for wheat growth in Heilongjiang Province, the average corn size is 1 to 1.5 leaves. The plant height is 15 to 20 cm short; the average rice is 0.5 to 1 leaf less, and the tiller is 1 to 2 less. Due to the precipitation in this spring, the timing of spraying is not good. Some corn and soybean plots have poor sealing effect, and the grass shortage is more serious. Some soybean fields were affected by low temperature and high humidity in the early stage, and obvious leaching phytotoxicity occurred. The recent increase in temperature of paddy fields accelerated the release of phosphate fertilizer, resulting in eutrophication of rice fields and mossy water stalks in the water layer. July is the key season for the rapid growth of crops. According to the opinions of experts, the province should focus on five aspects of implementation.
First, we must strengthen the shovel and cultivate. All localities should seize the favorable opportunity of fine weather and rising temperatures in recent days, and concentrate various mechanical forces to speed up the shovel. In particular, we must give full play to the role of agricultural machinery cooperatives, large agricultural machinery and agricultural machinery, and speed up the progress of the second shovel. Any deep-growing land should be deepened, and efforts should be made to expand the deep-root area of ​​the ridge, activate the soil, and absorb the heat. To promote the rapid growth of crops.
Second, we must scientifically apply fertilizer. At present, the physiological seedling age of corn is in the 6-10 leaf stage, which is a good time for topdressing. All localities should educate and guide farmers in accordance with the technical opinions of agricultural experts, and pay close attention to topdressing and promote crop growth. For the weak seedlings, the corn plots should be topdressed in advance, “eat less meals†and speed up the transformation and upgrading of the second and third types of seedlings. Spraying foliar fertilizer and plant growth regulators is an effective way to promote the growth of weak seedlings. In the 7-8 leaf stage, corn can be sprayed with potassium dihydrogen phosphate + urea + rice vinegar. Soybean is affected by phytotoxicity and affects plant dwarf seedlings and weak plots. Foliar spray can be applied by beneficial micro-concentration solution, Bi-protection and rooting powder.
Third, we must do a good job in paddy field management. It is necessary to strengthen the management of the water layer and implement shallow water irrigation. The water layer should be kept at about 3 to 5 centimeters, which will reach “the water is not exposed to mudâ€. In the field of well water irrigation, it is necessary to adopt a comprehensive warming method such as adding a sun pool, raising the water head, extending the water channel, and adding a water board, and doing everything possible to increase the water temperature and then replenish the field. It is necessary to strengthen technical guidance and prematurely topdressing the rice during each growth period. In principle, it is mainly based on the application of ammonium sulfate and potassium fertilizer to avoid blindly applying a large amount of fertilizer and topdressing too late.
Fourth, we must control pests and diseases. For the occurrence of corn top rot, the removal of wrinkled leaves and spraying of carbendazim WP can be carried out; in addition to manual salvage and water exchange, the paddy field can be sprayed with copper sulfate and water cotton. The solution is controlled, and the growth environment of the seedlings is improved as soon as possible, and the hair roots are promoted. At the same time, it is necessary to strengthen the prevention and control of major pests and diseases. For some dry land grassland, it is necessary to take timely post-emergence chemical weeding. For large-scale weeds and ridges and channel weeds in paddy fields, manual extraction should be organized in time.
Fifth, we must prepare for drought relief. According to the forecast of the Heilongjiang Provincial Meteorological Department, from late June to early July, the temperature in the province is high and the precipitation is less. In some areas, the probability of drought in the seedling period increases, especially in the traditional dry areas of the west. The drought-prone areas should prepare for drought early.
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