Cotton Sandwind Characteristics And Influence On Cotton Growth And Development

Every year spring spring sowing season, because of the loose, dry land, the earth’s surface, exposed is thearal agricultural areas sand the worst of the year.In April2013to August by setting small weather stationsin the cotton fields, the amount of dust weather dust collection at, and record the relevant meteorologicaldata, the cotton underlying surface wind and dust quantity characteristic and the relationship between thetwo.At the same time with cotton as test object.Set2:1processing natural conditions of cotton growth(CK);Second processing is the cotton, which grows in the is not affected by the sand dust storm before usebreathable cotton gauze shade treatment.The sand and the unity of cotton photosynthetic characteristics andthe influence of yield and quality.Results show that:(1) sand and wind are mainly distributed in the middleof April to may in late in late may after the high wind speed overall size is on the decline.Cotton fields inthe wind speed increases with the increase of the height, and the overall distribution obeys the rule oflogarithmic function.(2) the amount of dust in the cotton fields with height of overall change relativelyaccords with power function decline trend.With the increase of height, amount of dust is on the decline.(3)in2m height, wind speed and the amount of dust in the whole cotton fields accords with power functionrelationship, dust quantity increases with the increase of wind speed.(4) is not affected by sand cotton cropsgrown in transpiration rate;Photosynthetic rate;Stomatal conductance.Chlorophyll content is higher than thenatural conditions of cotton growth.This is because the sand through forced the closure of pores,intercellular CO2concentration to inhibition of photosynthesis.Sand has a significantly lower ontranspiration rate, this is because the wind speed increase after the decrease of the interfacial resistance,promote the exchange of cooling and evaporative cooling.(5) the sand effect on cotton is mainly in theprocess of seedling growth of cotton seedling damage, main show is injured leaves, broken stem;In theprocess of the growth of cotton, will inhibit the growth of cotton buoyant;The sand cotton quality there isno significant impact.