Effect Of Irrigation Amount On Growth And Yield Of Degradable Film Covered Drip Irrigation Maize

Object:With the widespread application of under-film drip irrigation technology and the rapid development of modern agricultural economy,the serious waste of water resources and the problem of residual film pollution have become increasingly serious.Therefore,the development of high-efficiency water-saving,environmentally sustainable modern agriculture has become the current agriculture.The trend of development.In this paper,the field experiment was conducted to study the effects of irrigation amount on the physiological growth,soil temperature,soil moisture,soil respiration and yield of degradable films covered with drip irrigation maize,and to explore the comprehensive effect of irrigation amount on degradable plastic film covering drip irrigation corn.Water irrigation,reducing residual film pollution,and promoting sustainable development of agriculture provide reference.Methods:This experiment is based on field trials.The tested corn is widely used in Xinjiang to promote the mid-late and late-maturing variety“Xinyu 66”with compact plant type,drought resistance and thinness resistance.The test mulch is the two species commonly used in Xinjiang.Degradable mulch film?M1,M2?and a common mulch film?M3?.The irrigation quota is set at four levels of 3625,4625,5625,6625m³·hm^-2?respectively referred to as W1,W2,W3,and W4?for a total of 12 treatments and 3 repetitions.Results:?1?The average temperature of 5²5 cm soil layer was not significantly different in the early stage of maize growth?50 d?.In the late growth stage of maize,the degradable mulch film degraded in the field,and the thermal insulation effect of the degradable film decreased.The degradable film covered the average soil layer.Temperature drop.Observing the amount of water on the surface temperature of different soil layers in the early growth stage of the degradable film covered with drip irrigation,it was found that the highest ground temperature value of 5-10 cm soil layer appeared at 14:00,and the highest ground temperature value of 10²5 cm soil layer appeared at 16:00.The degradable mulch film has better water-retaining effect on the degradable film in the early growth stage of corn,and the water-retaining effect of the degradable film in the late growth stage of corn is not significant.The mulching film mainly affects the water content of 0-40 cm soil layer,and the soil moisture of 40-100 cm soil layer is less affected by the mulching film.The water consumption of maize increased firstly and then decreased from the emergence stage to the mature stage.The corn consumption during the tasseling period was the highest,and the demand for water was the most sensitive.?2?The effect of irrigation amount on the photosynthetic characteristics of degradable mulching film covered with drip irrigation maize showed that the effects of single factor irrigation,irrigation and film interaction on P_n,T_r,G_s and C_i in each growth period reached extremely significant levels?P<0.01?,the effects of single factor mulch on P_n,T_r,G_s and C_i in each growth period reached a significant level?P<0.05?.The effect of irrigation amount on the chlorophyll fluorescence characteristics of degradable mulching film covered with drip irrigation maize showed:single factor irrigation amount and single factor mulch film F_v/F_m,F_v/F₀,q^p,Y?II?,The effects of ETR and NPQ reached significant levels?P<0.05?.The effects of irrigation and film interaction on F_v/F_m,F_v/F₀,q^p,Y???,ETR and NPQ in each growth period were extremely significant.Level?P<0.01?.The W3M3 treatment effect was the best in each treatment,and the degradable films treatment W3M2 was second only to W3M3,and W1M1 had the worst treatment effect.?3?The plant height and LAI of each treatment showed a trend of increasing first and then decreasing with the promotion of maize growth period,and all reached the maximum during the tasseling period,and the maturity period decreased.The dry matter quality increased with the growth of corn growth period.The maximum value is reached during the maturity period.W4M3 treatment had the highest plant height,W3M3 treatment LAI was the largest,W3M2 treatment LAI was second only to W3M3 treatment,W3M3treatment had the highest dry matter quality,and W1M1 treatment dry matter accumulation was at least24.74%lower than W3M3 treatment.?4?Different irrigation rates were applied to the treatment of drip-irrigated maize with degradable membrane,and the daily variation of soil respiration rate was consistent,showing a single-peak curve.The W3M3 process obtains the maximum value of the day,and the W1M1 process obtains the minimum value,and W3M3 is increased by 10.12%compared with W1M1.The seasonal variation of soil respiration rate is as follows:as the growth period advances,the soil respiration rate increases first and then decreases,and reaches the maximum during the peaking period of corn growth.The soil respiration rate was significantly correlated with soil temperature and daily average temperature,reaching a very significant level?P<0.01?.Soil respiration rate was not correlated with soil volumetric water content and rainfall?P>0.05?,W3M3 soil temperature.The sensitivity is the highest and the sensitivity of W1M1 soil temperature is the lowest.?5?W3M3 treatment had the highest total soil respiration,W1M1 treatment had the lowest total soil respiration,and W3M3 increased by 40.70%compared with W1M1.W3M3 had the highest grain yield,followed by W3M2,and the lowest W1M1 yield was 15.53%lower than W3M3.W4M1 treatment irrigation water utilization efficiency is the lowest,W1M2 irrigation water utilization efficiency is the highest,which is 63.10%higher than W4M1.W3M2 deals with the best economic-environmental benefit value.W3M3 has the highest revenue,and W4M1 has the lowest return,which is 38.27%lower than W3M3.Comprehensive treatment of soil respiration,grain yield,irrigation water use efficiency,economic-environmental benefit value,input and output showed that W3M2 treatment was the best.Conclusion:The amount of irrigation had significant effects on the growth characteristics,soil water heat,soil respiration and yield of degradable films covered with drip irrigation.On the basis of this experiment,the effects of maize growth physiological characteristics,soil water heat,soil respiration,yield and so on,the optimal irrigation amount was 5625 m³·hm^-2,and the induction period of degradable mulch film was 80d.The theoretical basis for the promotion of high-efficiency water-saving and degradable mulch film in maize in northern Xinjiang is provided.