Mid-term field management of late rice

From the field to the heading period, it is an important period for the management of late rice fields. The objective of this period of cultivation management is to control the stalk growth, increase the percentage of spikes, promote large panicles, and reduce the degradation of spikelets. The main measures are as follows: 1. The most suitable period for drying the field is from the effective tiller termination period to the ear opening stage. The main function of the drying field is to control sorghum, strong roots, strong stalks, leaf smelting, and reduce pests and diseases. To master the techniques of drying up the fields, one must look at the seedlings, the other to see the fields, and the third to see the weather. Late rice generally begins to expose the field in about 15 days after throwing. Early morning sun, delayed late. More than basic seedlings, fertile soil, strong growth, dark green leaves, leaves bent, should be properly re-sun; basic seedlings, lack of growth, lighter leaves, should be light or only exposed sun exposure. In rainy weather, the drying time should be longer; on sunny days, it should be shorter. The sun should reach: the leaves fade, the leaves straight, the white roots appear, and the fields see the cracks, Tanaka does not set foot. In this year's late rice breeding period and early parturition period, there is more rain and less light, resulting in deviation of the quality of the seedlings, and the lack of early tillering. Second, early Shi Qiao Shi ear fertilizer this year's late rice seedling growth and early tiller, to provide conditions for early medium-term panicle fertilizer. Early application of panicle fertilizer can, on the one hand, promote swinging tillering into panicles and increase the number of effective panicles. On the other hand, let the seedlings absorb panicle fertilizer and then enter panicle differentiation, which can promote the differentiation of spikelets and branches, and increase the number of grains per panicle. In line with the early application of the field, should seize the opportunity to make up for the lack of early growth. From the end of August to the beginning of September, all localities should use the panicle fertilizer 2 to 3 days before the spike differentiation in accordance with the seedling development process. It is recommended that 2.5 kg of urea and 7.5 kg of compound fertilizer be applied to Mushi, and 7.5 kg of urea or 10 kg of compound fertilizer can also be applied separately. For soil fertility, overgrowth, and poor field crops should be applied late, lightly or without panicle fertilizer. Third, the scientific management of water application panicle fertilizer should have a shallow water layer, after the application can let the water layer naturally dry, early application of panicle fertilizer can be re-open field for a few days, the late application of the water layer to dry, and then irrigation shallow water layer. In mid-September, it is the relatively concentrated period of meiotic division of late rice in the province. The shallow water layer should be maintained for 5-7 days. After the meiosis period, the shallow water ground irrigation method shall be adopted, that is, the shallow water layer will naturally dry and then be filled with new water. . Diseases and Insect Pests Prevention The main diseases and pests of the mid-late rice include rice blast, sheath blight, rice leaf roller, rice borer, rice planthopper, etc. All localities should pay attention to forecasting pests and diseases and take timely measures. Control of rice blast can be used 40% per mu mu powder 50 grams of water spray 50 kg; control sheath blight available per acre 5% Jinggangmycin wettable powder 150 grams or 5% Jinggangmycin water 150 ml watered 75 kg Spray; control of rice leaf roller, rice stem borer can use 25% insecticide double 200 ml per mu watered spray; control of rice planthoppers can use 20% per acre 50 grams water 50 kg spray.