Method for determining rice grain filling dynamics

Abstract

The invention discloses a method for determining rice grain filling dynamics. The method includes the following steps: performing determination at the beginning of the full heading stage of rice, andperforming sampling; performing threshing, branch and stem removing and impurity processing on samples; setting alcohol selection, water selection and salt selection solutions with different density,and setting wind power with different grades; performing grain weight grading on grains by adopting the overlapping method of a grain liquid separation method and a grain sorting method; performing determination on the number and thousand-grain weight of the grains; constructing a thousand-grain weight matrix and a grain number matrix; and constructing the starting amount of grain filling. Throughthe adoption of a method of field big sample plus interval sampling and the utilization of the weight distribution characteristics of the grains during filling, grain weight grading can be performedon different grains based on salt selection, water selection, alcohol selection and different graded winnowing methods; and through the determination of grain proportions of different grain weights, afilling model can be constructed, rice grain filling dynamic characteristic values can be calculated, and rice grain filling dynamic results can be accurately obtained.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for measuring the grain filling dynamics of rice. Background technique [0002] Grain filling is a key step to determine the yield and quality of rice, and it is directly related to the seed setting rate and thousand-grain weight of rice. The traditional classic grain filling dynamic measurement is to use the heading and flowering period to list (200-500 pieces), mark different flowering dates, and take samples (15-20 ears) at intervals of 10-15 times during the filling period to measure the strength of strong and weak grains. Weight, and use the Richards equation to fit the grain filling process to calculate the grain filling rate during the filling period. However, this method has obvious defects in practical application, which makes the test results often unable to be repeated. The defects are as follows: 1) the sampling volume is small, and representativeness ...

AI Technical Summary

Problems solved by technology

However, this method has obvious defects in practical application, so that the test results are often unable to be repeated. The defects include: 1) the sampling volume is small, and representativeness cannot be guaranteed. For field experiments, the error of 10-15 ears is completely Depends on the human error of sampling; 2) the workload is heavy, in order to ensure the listing standard, at the same time in the field to judge the ears of heading and flowering, the flowering time must be marked, which leads to the sampling in the later stage, which needs to be continuously identified; After selecting the tillers with a certain growth advantage to represent the grain filling dynamics of the entire group, it is impossible to truly feed back the characteristics of the grain filling; 4) The distinction between strong and weak grains greatly increases the workload, but this distinction Only available for some studies

Therefore, in scientific research and production, there is a lack of a simple, efficient, and easy-to-operate method for measuring grain filling dynamics, so the present invention proposes a method for measuring rice grain filling dynamics to solve the deficiencies in the prior art

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