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A method for predicting rice yield under high temperature stress based on morphological parameters

A technology for high temperature stress and yield prediction, applied in prediction, data processing applications, instruments, etc., can solve problems such as abnormal growth and development of rice, high temperature stress, temperature sensitivity, etc.

Active Publication Date: 2019-02-12
NANJING AGRICULTURAL UNIVERSITY
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  • Abstract
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Problems solved by technology

Although the growth and development of rice requires a relatively high temperature, it is extremely sensitive to temperature during certain growth periods. If the upper or lower critical temperature is exceeded, the growth and development of rice will be abnormal, exceeding the high temperature range that rice can withstand high temperature stress

Method used

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  • A method for predicting rice yield under high temperature stress based on morphological parameters
  • A method for predicting rice yield under high temperature stress based on morphological parameters
  • A method for predicting rice yield under high temperature stress based on morphological parameters

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Embodiment 1

[0036] The temperature control experiment in the artificial climate chamber was carried out in the single and double rice cropping areas in Central China from 2016 to 2017. Two japonica rice varieties with different heat resistance are selected: Huaidao 5 (HD5, more sensitive) and Wuyunjing 24 (WYJ24, heat-resistant), sown in the middle and late May of each year, and the seedlings are raised by dry seedling cultivation until June Transplant into plastic pots with a height of 35 cm and a diameter of 30 cm in the middle and late ten days, and transplant 3 holes in each pot, and 2 plants in each hole. The soil in the pots was yellow clay, and 3.0g N and 2.0g P were applied to each pot. 2 o 5 and 1.5gK 2 O, one-time application of phosphorus and potassium fertilizers as base fertilizer, nitrogen base follow-up ratio is 5:1:2:2, other management is the same as high-yield cultivation. Air temperature and soil temperature data were collected by Em50G (Decagon Devices Inc.Washingto...

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Abstract

The invention discloses a method for establishing a rice yield prediction model under high temperature stress based on morphological parameters, which comprises the following steps of carrying out theshort-term extreme high temperature treatment on rice at the booting stage or flowering stage of rice, and setting a control treatment at the same time; obtaining the morphological indexes of rice under high temperature stress and obtaining the relative values of each index; obtaining rice yield and obtaining the relative value of rice yield; carrying out stepwise regression analysis between relative changes of morphological indices and relative changes of yield, and screening morphological indices related to yield; establishing a rice yield prediction model under high temperature stress based on morphological parameters. The method of the invention screens out the morphological index which is convenient to observe and can better predict the yield, the cost is low, and the method is simple and effective. A method for predicting rice yield under high-temperature stress base on morphological parameter is also disclosed, so as to realize the purpose of predicting rice yield based on themorphological index.

Description

technical field [0001] The invention belongs to the field of rice yield evaluation, and relates to a method for establishing a rice yield prediction model under high temperature stress based on morphological parameters and a method for predicting rice yield under high temperature stress based on morphological parameters. Background technique [0002] As an important food crop, rice is extremely important to my country's food security. With the intensification of the greenhouse effect, global warming and frequent short-term high temperature events have gradually become one of the main factors affecting the growth and development of rice. As a high-temperature and short-day plant originated in low-latitude tropical regions, rice has formed physiological and ecological characteristics to adapt to high temperature and short-day. Rice has different requirements and responses to temperature at different growth and development stages, but there is an optimum temperature and a crit...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 汤亮王浩宇刘蕾蕾朱艳曹卫星王巍
Owner NANJING AGRICULTURAL UNIVERSITY
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