The Effects Of Potash On Melon Nutrient Absorption And Yield Quality On Open Field

As Tulufan region often planted melon variety"Xin Miza36"as research object, combined with the previous absorption of the nutrients of the different regions of the melon and fertilizer characteristics, different amount of potassium, melon Physiology and Ecology (including chlorophyll content, stem diameter) quality (including nutrient uptake characteristics and yield index measures the total soluble solids, melon growth traits), to determine the optimal fertilization and optimal fertilization in melon time, in order to establish the scientific fertilization system for Xinjiang melon yield, efficient and sustainable development of technical support. The results showed that:(1)Melon per plant, vegetative organs and reproductive organs, dry matter accumulation rate each deal with the growth trend, are expressed as "slow-fast-slow". Seedling to flowering dry matter accumulation rate gradually increased after the enlargement of the dry matter accumulation rate began to decrease. Seedling to flowering, the size of each treatment rate followed by:K1> K2> K3> KO and enlargement period to maturity, the processing rate of the order of:the K2> K1> K3> KO is too high too low potassium volume does not conducive melon growth. In the amount of0-125kg/hm2potash, potassium can increase the dry matter accumulation in the reproductive organs, thereby improving yields.(2) The amount of potassium melon nutrient absorption critical periodΔt. Potassium can increase the absorption rate of melon nutrient, nitrogen nutrient uptake rate is greater than the phosphorus and potassium uptake rate. Potassium can also increase the nutrient uptake of different organs of different periods of nitrogen, phosphorus and potassium, especially in the reproductive organs, N、P、K literacy subabsorption has been markedly improved. The amount of potassium in the range of0-150kg/hm2, nitrogen and phosphorus uptake increased with the increase in the amount of potassium fertilizer, excessive potassium fertilizer will cause the nitrogen, phosphorus nutrient uptake decreased.(3)After a reasonable application of potash, is conducive to the melon stem diameter growth, maturity K2deal with than the stem diameter the value of KO and K3processing, respectively, higher than the3.49mm,3.17mm. The amount of potassium in150kg/hm2, chlorophyll content, sugar content reaches its maximum.(4) Potassium yield of melon. Y=-0.3549K2+84.27K+25700(R2=0.7474, n=12), the maximum amount of potassium119kg/hm2maximum output of30702kg/hm2; the economy potassium content for116kg/hm2, the economic output of30700kg/hm2.