Influences Of Different Film Mulching Modes In Sping Maize Physiological Characteristics And Soil Environment Under Drip Irrigation

this experiment was conducted under the condition of different film mulching modes under drip irrigation through environmental change of farm land soil,spring Maize growth and development index, physiological and ecological effects, leaf water use efficiency and yield during spring Maize whole growth period,The main results are as follows:1.Effect on the growth and development of maize by different film mulching drip irrigationUnder condition of drip irrigation covered by film,all treatments can speed the growth process of corn, covered the whole drip (QM) and wide coating drip (KM) role promoting the growth and development of corn more obvious among the treatments. Tests showed that dry matter accumulation of QM, KM, SM, JM were significantly increased compared to CK(p<0.05),LAI of QM, KM, SM, JM were increased compared to CK. Corn ear length, ear diameter, the grain number, hundred kernel weight of QM,KM,SM,JM treatments were increased compared to CK,resulting in these four ways drip-irrigation increase production compared to CK, with the biggest increase for the QM, followed by KM.2. Photosynthetic characteristics of maize by different film mulching drip irrigationAnalysis from leaf net photosynthesis rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), intercellular CO2concentration (Ci), leaf water use efficiency instantaneous (WUEi), relative chlorophyll content (SPAD) and fluorescence parameters number shows that all of the treatments promote the role of photosynthesis of maize Pn, Tr and Gs were significantly higher than CK (p<0.05), WUEi,Pn,Tr and Gs shows significantly positively correlated; between them and the four indicators also showed a significant positive correlation with the CO2concentration showed a significant negative correlation.The SPAD index of QM, KM, SM, JM during the whole growth period were improved by6.1%-16.4%compared to CK. Maize leaves basis fluorescence (Fo) decreases, and the maximum fluorescence (Fm), photochemical efficiency (Fv/Fm) and other parameters increases by different treatment, and QM and KM was significantly higher than other treatments. different layers of Corn shows lower leaves> middle leaves> upper leaves in every treatment; Fm shows lower leaves greater than the upper and middle leaves; Fv/Fm index shows middle leaves> upper leaves> lower leaves; and the middle and lower leaves were significantly different.3. Soil water temperature conditions under different film mulching drip irrigationThese four ways drip-irrigation,during the whole growth period0-lm soil moisture were improved8.7%-24.9%compared to CK,especially QM and KM were improved significantly. Each growth stage0-lm soil of each treatment shows QM> KM> SM> JM> CK, higher than CK6.12%-19.41%respectively, Water use efficiency of QM, KM, SM, JM were higher than CK11.3%-27.3%, QM shows the highest in soil moisture and water use efficiency,followed by KM. In0-25cm soil layer of QM, KM, SM, JM, the average daily temperature is increased,higher than CK1.2℃-5.1℃.≥10℃accumulated soil temperature were improved184.1℃-489.8℃compared to CK, every treatment delays the date in which the soil temperature is below16℃, promotes the process of corn filling, so grain weights and yield increases.