Northwest rain-fed winter cropping area (north of Hebei Province, northern part of Beijing, southern Wulanchabu City of Inner Mongolia Autonomous Region, most of Shanxi Province, northern Shaanxi Province, western Henan Province, northern Ningxia Hui Autonomous Region, eastern Gansu Province) 1. Fertilization management principles (1) Last winter, the temperature in the northwestern dryland was high and the precipitation was too low. In this spring, the precipitation and soil moisture should be targeted to all parts of the country. Before the wheat is returned to the green, it can be repressed or slashed to protect the sorghum, prevent cold and freeze, promote the transformation of the seedlings, and enhance the wheat. Drought resistance and cold resistance. (2) In response to the situation of the seedlings, seize the opportunity, carry out the early spring topping and chemical regulation, and promote the combination of control to ensure stable production and increase production of dryland wheat. 2. Fertilization advice (1) In order to prevent post-rain drought, dryland wheat should take effective water conservation measures in time to prevent and reduce the loss of soil moisture before the early spring wheat closure. Relieve or slash at the right time before the soil is thawed and returned to green, remove the filth, solidify the soil, and provide protection. For dry land that has been overwintered with winter water, it will be drawn early before thawing and returning to green, breaking the knot and eliminating cracks. Before the wheat is sealed, 200-300 kg of wheat or corn stalks per acre can be covered between rows to reduce the evaporation loss of soil moisture. (2) In the field where the fertilizer is insufficiently invested, it is necessary to grasp the timing of the rain and timely carry out the wheat early spring topdressing. The nitrogen-deficient field uses 5-7 kg of urea per acre, and the phosphate-poor field uses 7-10 kg of diammonium phosphate per acre, and is applied to the soil by a fertilizer applicator (耧). Dry land with irrigation conditions, combined with spring irrigation, 6-8 kg of urea per acre of nitrogen-deficient fields, and 8-10 kg of diammonium phosphate per acre of phosphate-poor field. (3) Early planting and high fertilization amount of the winter before the long field, it is necessary to promote control. In dry land without irrigation conditions, it is necessary to suppress the shovel and protect the raft as soon as possible. In the dry land where the winter water is poured, the water should be drawn early and the spring watering should be postponed until the late jointing stage. (4) Fields that are planted late and have weak seedlings should be combined with Baoyu as early as possible to improve the ground temperature and promote the growth of weak seedlings. This article URL: Guiding Opinions on Scientific Fertilization Technology in the Winter Wheat Region in the Spring and Autumn Rainfed in the Spring of 2015
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