关键词: 凌源市, 凌源市, 农用地分等, 自然质量等, 土壤质量

Abstract:

It was studied based on sunshine, temperature and rainfall that autumn leaves color of Acer truncatum Bunge changes as by difference of climate actors. then probe into eco-mechanism of the autumn lives changing color of Acer truncatum Bunge and provide scientific basis for growing and management Acer truncatum Bunge. based on the study to eco-mechanism of the autumn lives changing color of Acer truncatum Bunge ,three kind of tests were engaged in Shanxi agricultural university forest station. The result is that sunshine is a important index which effects the autumn lives changing color of Acer truncatum Bunge. Full sunshine is helpful to accumulate sweets in to the autumn lives, and then increase change of leaves color. With increasing of intensity of illumination, there will be a gradual increase of the anthocyanin quantity of autumn leaves of Acer truncatum Bunge. Under the Full illumination condition, anthocyanin quantity of autumn leaves of Acer truncatum Bunge will be high than other three tests. In it, under the 35% of full illumination condition, the anthocyanin quantity of autumn leaves reduces obvious. It is profitable that color of the autumn leaves was increased in the period and areas with more rainfall, especially the color and luster of the autumn leaves were showed. Rainfall takes a very important part to increase soil water content and air humidity. In it, air humidity may be more important than soil water content to increase color of autumn leaves. When temperature reached into physiological temperature lower limit of plant the life action of plant will tend to stop. Changing color of the autumn lives is a saving response of plants against bad environment condition. The temperature condition down of 5OC might is main factor to effect changing color of autumn leaves and high day-night temperature difference just is helpful to accumulate sweets and composing anthocyanin.