Effect and Application of paclobutrazol on Rice
Paclobutrazol is a highly active plant growth retarder and broad-spectrum fungicide. The physiological effects of pp333 in the world and MET in China are mainly dwarfing, promoting tiller and improving stress resistance. Moreover, it is a simple, easy and effective measure to increase yield by turning green quickly, tillering early, increasing the number of effective panicles, seed setting rate and 1000-grain weight.
After experiments in various parts of Liaoning Province in recent years, it was found that there were the following changes in the zole yield of rice seedlings compared with the control.
1. The seedlings are getting shorter. After spraying paclobutrazol at the seedling stage, the rice seedlings turn green and become shorter, the seedlings are strong, the leaves are tall, and the stems become shorter. Generally, the seedlings are 3.4-4.8 cm shorter than the control, the leaves are 3.2-5 cm shorter, and the leaves are about 0.04 cm wide. The number of tillers increased by 0.9-1.8.
two。 The root system is well developed and the stress resistance is enhanced. The seedlings sprayed with paclobutrazol had developed roots, many white roots, stout and long milk. The total number of roots is 2.5-3.5, and that of white root is 3.8-6.4. The root system activity is exuberant. After transplanting, it turned green 34 days earlier, with strong drought resistance, cold resistance and mild disease.
3. The effective tillering rate is increased, the panicle rate is high, and the seed setting rate is high. In the seedlings of paclobutrazol, the tillering occurred early, the tillering rate increased, and the leaves were straight. According to the survey, the number of effective panicles per mu increased by 1-27000, and the panicle rate increased by 2.5% and 4.8%.
4. The output has increased. Increase production by 20-40 kg per mu.
Methods of using paclobutrazol in raising rice seedlings:
1. Spray time. Soak seeds or spray at 1 leaf and 1 heart stage of seedlings.
two。 Dose standard. According to local experiments and application results, generally 15% paclobutrazol per mu 100-150 grams, mixed with water 50 kg, evenly sprayed on the seedlings.
3. Points for attention. Drain water and drain the seedling field one day before spraying. Most of the seedlings in Liaoning are raised in drought, and there is no water in the seedling period. After spraying! Rehydration day and night, normal management, spray on the day of rain to re-spray, but the amount of medicine can be reduced, spray in the process to operate agitation liquid, spray while stirring.
It is strictly forbidden to prepare the concentration and dosage of multi-acting azole solution according to the operating instructions, excessive inhibition of plant growth, resulting in a reduction in yield.
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Ejingnuo No. 6 (Rice)
Breeding unit: agricultural Science Research Institute of Jingzhou District, Hubei Province. Approval: approved by the crop Variety approval Committee of Hubei, Henan, Sichuan and Hunan provinces, and approved by the National crop Variety approval Committee in 1991. Variety registration number: GS01002-1990. Source of variety: Guichao No. 2 was treated with radiation. Characteristics: the plant height is about 110 cm, the plant type is loose and moderate, the upper leaves are narrow, long and straight, the tillering ability is medium, and the heading is neat. There are 250000 effective panicles per mu and 90 filled grains per panicle.
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Get twice the result with half the effort with half the effort to control rice diseases and pests in winter
In winter, rice diseases and pests are dormant: pests stop feeding and germs stop infecting. If farmers seize this favorable opportunity to carry out prevention and control, they can achieve twice the result with half the effort. First, deal with diseased straw. Diseased rice straw is the overwintering place of pathogens of many diseases, such as bacterial leaf spot, bacterial blight, rice blast and so on, and is the main source of infection in the second year. Before the end of March, farmers can compost diseased rice straw at high temperature, or for feed and fuel treatment, which can greatly reduce the number of bacteria. For the diseased rice that can't be disposed of before the end of March
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