Early prediction method for rape yield and rapeseed pod-shading device

Abstract

The invention discloses an early prediction method for rape yield, which includes the following steps: (1) rape, the variety and growing state of which are the same as the variety and growing state of rape to be predicted, is chosen as a model sample, a chlorophyll fluorescence induction kinetics curve of pods of the model sample is acquired, and fluorescence parameters are extracted as feature parameters of the model sample; (2) after the pods of the model sample are harvested, the weight of the seeds of the pods is acquired as a yield value of the model sample; (3) according to the extracted feature parameters and yield value, a suitable machine learning regression model is chosen and trained, so that a quantitative prediction model is obtained; (4) the chlorophyll fluorescence induction kinetics curve of pods of the rape to be predicted is acquired, feature parameters are extracted, and according to the feature parameters of the rape to be predicted and the quantitative prediction model, the early prediction of the yield of the rape to be predicted is carried out. The invention further discloses a rapeseed pod-shading device. The early prediction method for rape yield disclosed by the invention can carry out early prediction on rape yield at the stage of rapeseed pods, and the prediction result is reliable.

Description

technical field [0001] The invention relates to the field of chlorophyll fluorescence technology, in particular to an early prediction method of rape yield based on chlorophyll fluorescence technology and a rape silique shading device. Background technique [0002] Rapeseed is an important oil crop with the largest planting scale and rapid development in my country. The rapeseed oil produced is rich in fatty acids and vitamins and is one of the main edible oils in my country. The silique stage is a critical period of nutrient accumulation in the growth stage of rapeseed. During this period, a large number of leaves fall off, and the silique becomes the main photosynthetic organ, which can absorb about 80% of the effective incident light. Two-thirds of the grain filling material comes from the silique. Photosynthetic products of fruit. Therefore, the photosynthetic characteristics of siliques have important indication significance for the yield of rapeseed. [0003] As a se...

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Problems solved by technology

[0004] In addition, considering that the dark-adapted leaf clip equipped with the testing equipment is more suitable for thin-flaky leaves, it is not suitable for plant fruits such as rapeseed siliques, which are flat and slender, with multiple seeds growing inside the two carpels

The supporting leaf clip of the plant efficiency analyzer cannot completely clamp the surface of the silique, and the external light can shine into the dark-adapted area in the leaf clip from the slit, resulting in incomplete dark-adapted areas in the area to be tested, which affects the detection effect

Moreover, the shape and structure of the siliques make the leaf clips extremely unstable during the clamping process, and are prone to misalignment or even falling when connected to the detection probe, which seriously affects the detection accuracy and efficiency

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