Effect Of Different Mulching Methods On Nutrient Uptake And Transport And Soil Nitrogen Of Maize

The effects of different film mulching methods on the growth and nutrient uptake and utilization of maize and the rule of soil nitrogen residue were explored in order to provide a reference for the optimization of the mulching mode in the semi-arid area.Field experiments were carried out in 2015-2016,Pengyang County,Ningxia province.The field experiments of different film mulching methods were set up.All-film double-furrow sowing(D),flat plating with half film mulching(F),furrow rainfall harvesting system(R).The field soil temperature,crop growth,nutrient absorption and soil nitrogen residue were studied.The main results were as follows:1.All-film double-furrow sowing(D)and flat planting with half film mulching(F)significantly increased the corn planting farmland harvest 0~60cm soil water content,compared with ridge and furrow rainfall harvesting system(R)increased by 18.9% and 6.15%.All-film double-furrow sowing(D)in maize seedling 0~20cm soil temperature than flat planting with half film mulching(F)and ridge and furrow rainfall harvesting system(R)increased by 0.25? and 2.5? respectively.2.All-film double-furrow sowing(D)significantly increased the plant height,leaf area,photosynthetic rate in early stage.The maize yield respectively compared with flat planting with half film mulching(F)and ridge and furrow rainfall harvesting system(R)significantly increased by 26.7% and 33.6%,WUE increased by 28.27% and 36.1%.3.film mulching on maize organs nitrogen content had no obvious effect,but the all-film double-furrow sowing(D)biological yield was significantly higher than flat planting with half film mulching(F)and ridge and furrow rainfall harvesting system(R),and the nitrogen accumulation were also significantly higher than the other two and 10.4% planting patterns 10.3%.All-film double-furrow sowing(D)of the post anthesis dry matter transport and transport of nutrients were significantly higher than that of planting pattern(F)and ridge and furrow rainfall harvesting system(R)semi cover,nitrogen utilization rate increased by 28.4% and 24.9%,respectively.4.The all-film double-furrow sowing(D)significantly increased the plant height and leaf area,and the photosynthetic rate at the early growth stage,and significantly increased the corn yield compared to the other two film-mulching methods,respectively,compared to the flat plating with half film mulching(F)and the ditch The rain-covered half-coverage planting pattern(R)increased by 26.7% and 33.6%.