Effects of Different Soil Amounts and Nitrogen Fertilization Amounts on the Nutrients Uptake Amounts and Biomass of Maize
|School||Jilin Agricultural University|
|Keywords||Existing farming system One - time fertilization Nutrient uptake Biomass|
In this paper, the Songliao Plain Corn Belt black soil region of existing farming systems, two different cross-sectional configuration of the \Outdoor potted simulation Different Soil on corn seedling stage, heading stage and mature growth traits, biomass and grain yield, Different Soil on seedling stage, tasselling, and ripening stages corn plants, root During Grain total nitrogen, total phosphorus, total potassium content and uptake of; explore the impact of one-time fertilization system under different nitrogen fertilizer on corn whole growth period of growth traits and yield of corn, the corn plant, root and grain full nitrogen, total phosphorus, total potassium content and residual soil nutrients. The results showed that: 1, loaded with the increase of the amount of soil, corn biomass and yield increase. No fertilizer 5 kg soil, 10kg soil and 15kg soil processing corn production for 11g, 36.2g and 57.3 g, compared with no fertilizer 5kg soil treatment, of no fertilizer 10kg soil and 15kg soil processing corn production increased by 229 % and 421%; 5kg soil fertilization, 10kg soil and 15kg soil processing corn yields were 53.9g, 132.8 g and 153.6g fertilization 5kg soil treatment comparison increased by 146% and 185%. Corn biomass, 5kg soil with no fertilizer treatment compared to the other treatment total biomass of maize seedling growth in the range of 65% to 218%, the heading stage in the range of 82% to 353%, maturity 71 % ~ 369%. Different Soil on corn growth status loaded with the increase of the amount of soil, the whole growth period plant height and stem diameter. Plug the increase of the amount of soil, corn root volume of each period, the total absorption surface area and active absorption surface area and total absorption surface area and active absorption surface area gradually increased from maize growing pre-birth to post-root, but live / better than gradually reduced. 3, with the soils increased various periods of corn plants, roots and grain entire amount of nutrient uptake and the total increase. Total nutrient content of corn plants and roots are the highest in the seedling stage, gradually decreasing over time content seedling to tasseling decreased rate, and tasseling after a period of decline. Corn root to shoot ratio Plug the increase of the amount of soil decreases. Corn root to shoot ratio can be used as an important indicator to measure soil nutrient and water supply to the crop capacity. Shoot ratio is too large description of the soil nutrient and water supply capacity is weak, stress root substantial growth. 5, one-time fertilization system under different nitrogen fertilizer on maize growth conditions show that compared with the control (no fertilizer) compared to the seedling stage light to moderate fertilization is conducive to the growth of corn, can increase the corn plant height and stem diameter, and excessive fertilization burn seedlings, seedling corn plant height and stem diameter smaller. Maturity, 2 times the field of conventional nitrogen fertilizer plant height highest four times the field of conventional nitrogen fertilizer processing the maximum stem diameter up to 5 times the amount of nitrogen fertilizer field of conventional nitrogen fertilizer processing larger stem diameter and plant height shorter.