Effects Of Water And Fertilizer Cooperation On The Growth And Nutrient Absorption And Root Activity Of Summer Maize

The article with the studying object of maize and using the methods of pipe trial combination with the indoor analysis systematically studied the effects of water and fertilizer cooperation on nutrient absorption and root activity of summer maize in piedmont plain area of north China. The results established the theory basis for guiding the high yield and high efficiency of corn. The main results are as follows:1. There are different of Potassium and water treatments on plant height and stem diameter and leaf area index of summer maize is "unimodal" curves,corn plant height and stem diameter are goning up tasseling stage,leaf area index is goning up peak at silking stage。Under the same conditions of fertility and water,there are increasing water irrigation and dosage of Potassium,which increase in the number of biological shapes of summer maize,in order to laying a foundation for high-yield。different water and potassium treatment W3NPK2 on grain number,per hundred weight,yield is the highest。Under the same fertility and different irrigation treatments are significant differences (P<0.05) on grain number and yield,and under the same fertility and different irrigation treatments are significant differences (P<0.05) on kernel weight F0 and NPK2,which indicate to water and fertilizer combined with synergies。2. Root absorption of water has a good effect on the total area and the active absorption area。Under restricting root growth space conditions,irrigation can increase the absorption area and active absorption area,and with the same irrigation dosage of Potassium has also a good effect on root system and active absorption area。With depending on the status of soil water supply,Potassium supplying has the effect on root absorption of total and active absorption area。When the irrigation water, dosage of potassium can improve application。Whether or not any irrigation, potassiumon root absorption area percentage are an upward trend3. Throughout the growing season,With the growth transfer center,Potassium distribution is changing in maize growth period。During the growing,potassium is mainly assigned to the leaf and stem。Before the silk period,distribution of potassium is up to in the leaf。During the spin silk period,leaves of potassium is transfered to a grain,sothat the percentage of potassium is reduced in single。Since water and K supply promoted transfer of nutrients from the vegetation organs to the grain and raised its proportion of nutrients,crop yield was thereby greatly increase。the total N,P,K content of maize roots in spike formation stage was higher than silking and maturity,and with the promotion of corn growing period decreased。From the spike formation stage of the mature roots of maize reduced the rate of N,P,K accumulation in W3NPK2 highest,within the N,P,K accumulation rate decreased to W3NPK2 highest,W0F0 and W1F0 minimum,which is corn on the ground nutrient accumulation dynamics and root absorption area and active absorption area of the same trend,indicating that maize nutrient accumulation of shoot and root nutrient accumulation is adapted4. The result showed that the changing trend of dry matter accumulation and nitrogen and potassium accumulations of maize was similar。The highest plant nitrogen and potassium cummulation amounts were appeared from shooting stage to spike formation stage。And the phosphorus accumulation was mainly expressed from tasseling stage to maturation period。The variation of root active absorbing area and total absorbing area in different growing stages was all assumed unimodal curve, and the peak values were presented in spike formation stage and tasseling stage。The root active absorbing area was the dominated factor to the accumulation of plant dry matter and nutrients under sufficient water and fertilizer conditions in maize growing season。Fertilizer application promoted the root active absorbing ability,accelerated the nutrients accumulation。Irrigation in growing stage could promote root growing and absorbing nutrients。In this trial W2F1 treatment had the highest accumulation amounts of dry matter and nitrogen,phosphorus,potassium nutrients in different maize growing stages。...