Cotton Field Experimental Research On Movement Of Water And Salt Of Drip Irrigation Under The Film In Soil

With the development of agricuture in xingjiang,Great proportion of salina and infield salinization already is highly limition condition。So research on movement of water and salt of cotton field is great significance。Through the field experimrnt in 121 county of ShiHeZi city as example,we survey soil moisture characteristic cruve through the room experiment,Then it analysizes soil water and salt movement regulation of irrigation under the film through the field experiment;For the field experiment,Firstly,we have the experiment on double point source meet by modeling local distance and flux of drip by use of local soil and water,It concludes movement regulation of water and salt of meet area。Secondly,It choose ten different times'cotton fields of irrigation under the film,it analyses soil salinization level by Main component analytical method in the field experiment;Then We assay soil during the four different periods that include before sow,Seedling period,Prosperous flower period,harvest period,We conclude walter movement and the accumulative status of salt;It draws the following conclusion:1)Survey soil moisture characteristic curve and some parameters in the room by mercury column method。2)About the double point source meet experiment,salty desalt area grows when influx grow and distance reduce,This is beneficial to cotton's growth。So when the water number is the same,we suggest that collocation method of big influx and small distance is benefit for form of cotton's desalt area and for high yield of cotton。3)Different layer soil water content before sow in the four growth stage at the same time is higher than one during the Seedling Period,water content increase after the first irrigation,it arrive at the maximum during the prosperous flower period,it reduce after that,it reduce to the minimum during the harvest period; movement character about the salt is that salt content before sow is the maximum,it drop during the Seedling period,it grow during the Prosperous flower period,it drop again during the harvest time; 4)Salt content's variation character of different soil layer of different year cotton field under the film is that no regulation except that before sowing,It adds gradually in the different soil layer with the addition of irrigation year;it is very obviously during the Prosperous flower period;at the same growth period Salt accumulate of the cotton field in the different time increase when plant time of cotton grow under the film;30-60cm soil layer is the maximum accumulative area of salt。...