Study On The Effects Of Potash Fertilizer On Nutrient Absorption And Yield Quality Of Cotton

According to the studies of cotton's fertilizer characteristic and physiology, in different regions do the experiment of different potash effects on cotton efficiency of nutrient and yield quality, in order to reacher the characteristic of cotton nutrient characteristic in north of Xinjiang. The affect of xinjiang cotton nutrient absorption and the yield quality by potash fertilizer provides certain basis to the potash fertilizer reasonable employment.During the whole growing stage, the organic biomass of cotton's upper part accumulates slowly in the seedling period, gradually speeds up at the middle stage, and, the tend is steady in the last, it matches to model"S". The organic biomass accumulation of upper part of cotton is increasing with the addition of potash fertilizer quantity. During the different treatments, the trend of the organic biomass accumulation is consistent, the upper part of nourishment organs such as stem, leaf is the accumulation but increase slowly before, then the reproductive organs as flower bud, boll, cotton seed and the fiber of cotton accumulate quickly, and do the most quick from the flower stage to the boll stage.The dry matter and the cotton nutrient absorption is dynamic congruous in the experiment, and conform to the plant growth curve"S"that change slow in seedling stage and speed up gradually in the flower bud time, arrive at the peak until blossoms to full-boll stage, hereafter tend to be steady gradually.The equation fitting is good that simulates dry matter and the nutrient with the Logistic equation. Potash fertilizer can enhance the maximum value of the cotton dry matter accumulation obviously, and extend the crucial phaseâ–³t that dry matter accumulation and nutrient absorption of nitrogen,phosphorus and potassium which increase along with the increase quantity of potash fertilizer in the scope of 0-60kg/hm².Enunciation shows : a some what, for the addition of the potash fertilizer using, the accumulation of N, P2O5, K₂O is increased because under the condition of raise potash alone, had more nitrogens, the potassium to participate the cotton material inside the body to synthesize with the operation. But when we increase potash to certain extent, the cotton stub reduces to the accumulation of the nutrient in the beginning. Between the different potash treatments, the cotton asordption velocity of N, P2O5, K₂O is more than K0. From the seeding to the 45d ,with the nourishment grow is lord, the absorption velocity of the nutrient isl very low, but to the 75d the absorption velocity is speeded up quickly, then its velocity is gradually enlarges but waves greatly,it may be reltant to the variety weather during in June and July. The trend of nutrient is slowly in the seedling period, gradually speeds up at the middle stage, then, tend is steady in the last.Potash fertilizer can reduce investigation of boll retention rate, increases the number of bud and the number of bolls; there is no tangible result that increases the quantity of potassium fertilizer to cotton single boll weight,lint percentage,but it may increase cotton bolls per plant obviously; potash fertilize increase the cotton yield and by increasing the boll number per plant to reduce shedding rates of buds and bolls.The potash fertilize effect equation is Y=-0.0517K²+5.3167K+1531.5, the quantity of K₂O to the maximum cotton yield is 51.42 kg/hm², the economical quantity of K₂O is 48.60 kg/hm², which corresponds the maximum yield is1668.19 kg/hm² and the economical yield is 1667.77 kg/hm².Potash fertilizer can increase the cotton's length,intensity,elongation ratio and limit count; The increase of cotton uniformity,Macro value is along with the increase quantity of potassium fertilizer; potash fertilizer can enhances the cotton maturity, but there is no obvious difference among the treatment.