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A rice anti-high temperature preparation and its application method

A technology of high temperature resistance and rice, which is applied in the direction of botany equipment and methods, applications, biocides, etc., can solve the problems of inconvenient large-scale promotion and application, and the huge cost of research on high temperature resistance methods, so as to facilitate instant and rapid large-scale application , Improving the effect of rice resistance to high temperature heat damage and low implementation cost

Active Publication Date: 2021-08-13
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research cost of this rice high temperature resistance method is huge, and it is not convenient for immediate and rapid large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use distilled water, potassium dihydrogen phosphate, calcium chloride, and sodium silicate nonahydrate to prepare three rice anti-high temperature preparations with different concentrations, which are: rice anti-high temperature preparation A containing 0.2% potassium dihydrogen phosphate, 0.12% calcium chloride, Sodium silicate nonahydrate 0.06%; rice anti-high temperature preparation B contains potassium dihydrogen phosphate 0.3%, calcium chloride 0.22%, sodium silicate nonahydrate 0.07%; rice anti-high temperature preparation C contains potassium dihydrogen phosphate 0.4%, chloride Calcium 0.32%, sodium silicate nonahydrate 0.08%.

[0019] The artificial climate chamber was used to simulate the high temperature process. At the beginning of heading and flowering at the booting stage of rice, four potted rice with the same area were sprayed with the same amount of rice anti-high temperature preparation A, rice anti-high temperature preparation B, rice anti-high temperat...

Embodiment 2

[0021] Selection of spraying days for anti-high temperature preparations: At the beginning of heading and flowering at the booting stage of rice, spray a solution containing 0.3% potassium dihydrogen phosphate, 0.22% calcium chloride, and 0.07% sodium silicate nonahydrate and distilled water evenly with a sprayer. On the rice plants, spray until the solution droplets evenly cover the leaves, the spraying rate is 2000kg per hectare per day, spray continuously for 3 days, 4 days, 5 days, 6 days and 7 days, and then put the potted plants into the artificial climate The box is subjected to high temperature treatment (6:00-18:00, 40°C, 18:00-6:00 the next day, 30, the average temperature is 35°C). After 5 days of continuous treatment, the rice materials were moved outdoors to grow naturally, the chlorophyll content and malondialdehyde content of rice leaves were measured, and the yield (average grain weight per spike) was measured at the mature stage. The results showed that the ch...

Embodiment 3

[0023] Spraying time selection of anti-high temperature preparations: Field experiments were carried out from July 22 to August 1, 2016, during the rice booting stage, heading and flowering stage. During this period, the daily average temperature exceeded 30°C, and high temperature heat damage occurred. Spray 0.3% potassium dihydrogen phosphate, 0.22% calcium chloride and 0.07% sodium silicate nonahydrate solution and distilled water evenly on the rice plants with an electric sprayer, and spray until the solution droplets are evenly covered with leaves So far, the spraying amount is 5000kg per hectare per day, and the spraying time is 6:00-8:00, 8:00-10:00, 10:00-12:00, 12:00-14:00, 14:00 00-16:00, 16:00-18:00, continuous spraying for 5 days, and the yield was measured in the mature stage of rice. The results showed that spraying the mixed solution of the three preparations from 6:00 to 8:00 had a better effect on improving the high temperature resistance of rice than spraying...

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Abstract

The invention discloses a rice anti-high temperature preparation and a use method thereof. The rice anti-high temperature agent is a mixed solution of potassium dihydrogen phosphate 0.2-0.4%, calcium chloride 0.2-0.3%, and sodium silicate nonahydrate 0.06-0.08%. . When encountering high temperature and heat damage weather during the rice heading and flowering stage, the rice field is sprayed with the rice anti-high temperature preparation at 6:00-8:00 every day, and the rice anti-high temperature preparation is required to be evenly sprayed on the rice leaves, and the rice Until the droplets of the anti-high temperature preparation evenly cover the leaves, the spraying amount of the rice anti-high temperature preparation is 900-11000kg of rice anti-high temperature preparation per hectare of paddy field. The rice anti-high temperature preparation and the use method thereof of the present invention can significantly delay the senescence of rice leaves, increase the photosynthetic rate of leaves and rice yield, and improve the ability of rice to resist high temperature and heat damage.

Description

technical field [0001] The invention relates to the technical field of rice stress-resistant cultivation control methods, in particular to a rice high-temperature-resistant preparation and a use method thereof. Background technique [0002] Rice is the main grain crop in my country, and its output accounts for about 1 / 3 of my country's total grain output. The high and stable yield of rice is an important guarantee for my country's food security. The middle and lower reaches of the Yangtze River are the main rice producing areas in my country, with rice planting area accounting for about 70% and total output accounting for about 50% of the country. Affected by geographical location and subtropical high pressure, high temperature weather with daily maximum temperature exceeding 35°C or daily average temperature exceeding 30°C is very likely to occur in this region from July to August. At this stage, rice in this region is in the development stage of booting to heading. , are e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/26A01N59/08A01N59/00A01P21/00
CPCA01N59/00A01N59/08A01N59/26
Inventor 江晓东华梦飞申双和杨再强姜琳琳
Owner NANJING UNIV OF INFORMATION SCI & TECH
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