Abstract:

Abstract: In field of cotton as CK, with the 20-year-old almond tree intercropping cotton of the photosynthetic characteristics yield and soil nutrient a comparative study, results showed that: ①almond and cotton intercropping cotton yield great influence mainly reflected in the decrease of Harvest lants、 Harvest bolls and Total bolls, thereby affecting the Seed cotton yield and lint yield, Inside of crown almond , Tow meter outside of crown almond of the Seed cotton yield were contrasted respectively comparatively having decreased 66.92% and 42.78% by degrees.②almond and cotton intercropping cotton changed the photosynthetic characteristics of diurnal variation, the control of cotton diurnal variation of photosynthesis both bimodal curve, and the changes of cotton intercropping both single peak curve, the peak times of change sooner or later, with the shadows on the length and direction.③hydrolysis of nitrogen,effective phosphorus,potassium,organic matter were declined in witch the place that have five metres distance the trunk of soil. Detemined cotton yield of fatal factor was almond and cotton intercropping cotton of photosynthetic characteristics.