The Potassium Effects On The Physiology And Yield And Quality On The High Quality Cotton

The experiment proceeded in Tongling Xian and the testing ground of Anhui Agricultural University from2007 to 2009.The content of it concered plant and physiology of cotton.,The effect of potassium on yield quality and quality of Kemian 3 and Kemian 6 .The primary results of research are as follows.1.Grow CharactersAccording to the result of the test, there were certain improving effect on height,the number of fruit branch of high quality cotton under potassium,but Potassium who had not big influence on the growth period.2.Accumulation and distribution of dry matterThe rule of change of nutritive organs dry matter weight per plant of the three treatments was almost the same during the whole preceeding,Which was"s".Before bllosom,The weight of dry matter of the three treatments of cotton was not evident different. During flowering stage,The accumuments of dry mather of the two kinds of cotton were not same,as is shown that the potassium treatment who fell fastly had more accumument than contrast treatment.They had the same rule in norish growth and reproduction growth.With the growth of cotton,the rate of reproduction growth improved and the norish growth fell,it achieved need in different time.The potassium treatment showed difference during the period of vomit,It's dry matter weight of reproduction organs and the rate surpassed contrast treatment.3. Photosynthetic propertiesAccording to the result of the test,the amount of Chlorophy of the potassium treatment was heigher than contrast treatment during the whole stages. The amount of the leaf area index of the potassium treatment was heigher than contrast treatment. The amount of Fv/Fm determine the efficiency of photon extraction, in other words, photosynthesis. According to the result of the test, the change of Fv/Fm during all stages is regular which is like a parabolograph. The potassium treatment's Fv/Fm was evident difference from contrast treatment which favored the photosynthesis of the potassium treatment. Fv/Fm daily variation has a slump at noon,which related with photoinhibition. 4 Oxide resistance enzymes activitiesThe SOD,POD,CAT activities and the chang of the content of MDA at Flowering stage were obvious, improved the resistance of external environment in the whole stages.The resistance of the potassium treatment was stronger than contrast treatment. The SOD,CAT activities of contrast treatment is weaker than the potassium treatment in Early flowering stage,Full flower stage and Boll opening stage. Oxide resistance enzymes accelerated the degradation of Chlorophy and increased the content of MDA,whicn reduced the efficiency of photosynthesis and weakened the intensity5 Yield and qualityAccording to the result of the test, potassium could effectively raise the number of bolls,good bolls and the proportion of good bolls. Potassium could also effectively raise the yield of the hign quality cotton.Kemian 3 had a special influence on production with KCl(450kg/ hm~2),the Lint yield was higher 4.92% than contrast treatment. Kemian 6 had a special influence on production with KCl(300kg/ hm~2), the Lint yield was higher 14.29% than contrast treatment. Potassium could fiber quality of high quality cotton,it was positive to fiber length and fiber strength.