Effect Of Subsoiling On Maize Physiological Characteristics And Yield

The experiment was carried out in 2015 and 2016, Jilin Agricultural University experimental field.Limin33 and Nonghua101 was applied in the field experiment。The effect of subsoiling on maize growth period morphological, physiological characteristics, water use efficiency, soil water content, dry matter accumulation and yield were studied.Determine the effects of subsoiling whole corn growth stages growth.Provide a theoretical basis for the cultivation of high-yielding maize.Subsoiling can effectively promote the growth and development of corn plants.Subsoiling by increasing plant height, leaf area index and the amount of dry matter accumulation,Subsoiling the plant can produce more of the source material.Provide a basis for improving grain yield.Subsoiling reduced ear and ear height coefficient corn, increasing the dry matter accumulation of underground, corn lower center of gravity.Increase the number of aerial roots and layers, improve the grip of corn, so corn lodging resistance has been effectively improved.(1) Subsoiling late to improve corn root activity and delay senescence of root growth.Subsoiling through increased root activity, increased maize root growth post-soluble sugar, soluble protein content increase, increase superoxide dismutase, peroxidase, catalase activity and reduce MDA content,to effectively slow down the growth of maize root senescence,extend the functionality of root conducive to grain filling, provide conditions for corn yield.(2) Subsoiling can improve corn Later Growth deep soil moisture content,improve water use efficiency of maize populations and water use efficiency,conducive to maize root to water and nutrient absorption, and promote the growth of the aerial parts of corn,improve maize ear length, ear diameter, kernels per row and hundred-grain weight and maize yield.(3) Subsoiling by breaking plow, increase soil porosity, promote surface water infiltration,improve soil moisture, thus contributing to the growth of maize root increased root activity,delay corn root system senescence, promote root absorption of water and nutrients in the late birth,delay corn root system senescence, promote root absorption of water and nutrients in the late growth, while promoting growth and dry matter accumulation amount of ground parts.Corn lodging capacity increase, thereby increasing the yield.