Method for judging and selecting dim light tolerance

Abstract

The invention discloses a method for judging and selecting dim light tolerance. The method includes steps of A, sowing, regularly sowing crop seeds in the growth environment manually controlled; B, identifying microsporogenesic stage, to be specifically, starting dim light stress treatment when AD value of more than a half crop stems ranges from -2 cm to +2 cm after a flag leaf elongating stage; C, performing dim light stress treatment, to be specifically, reducing the light intensity to 0-10% of that in sunny days, keeping for 3-5 d; D, counting spike kernels of the stems, to be specifically, counting in a middle grouting state; E, judging dim light tolerance of the crops. The method for judging and selecting dim light tolerance has a great significance for the crops in facing with the adverse environment of haze, rainy and sparse sunlight weather, global dimming and the like.

Description

technical field

[0001] The invention relates to the technical field of crop cultivation and planting, in particular to a method for quickly selecting low-light-tolerant crops. Background technique

[0002] Global climate change, weaker light or less rainy days threaten crop production: Light intensity is an important environmental factor that affects crop photosynthesis, growth and yield. With global climate change, industrial development, and increasing population density, aerosols and other pollutant particles in the air continue to increase, which significantly reduces the effective solar radiation reaching the earth's surface, and the earth's surface is getting darker (Stanhill and Cohen, 2001 ; Ramanathan and Feng, 2009; Li et al, 2010; Mu et al, 2010). In the Huanghuai-Hai wheat area and the middle and lower reaches of the Yangtze River, where the wheat area accounts for about 70% of the country, the total solar radiation decreases at an average rate of -4.5W / m every ...

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