| In recent years, the utilization amount of chemical fertilizers was kept at a relative stable level, but with a low efficiency. Thus, the non-point source pollution is getting more and more serve. To solve this problem, the nitro compound fertilizer, which is newly appearing, attracts much attention and wide acceptance in the market.In this study, the field yield, morphological observation and laboratory analysis were employed to study the effects of nitro compound fertilizer on the field, including corn yield, plant characters and the influence of soil nutrient, proven on maize growth and development process, the production and the influence on the soil environment, for further research on corn high yield and good quality and environmental coordinated development, to provide theoretical basis for the high quality and yield of corn in Jilin province. The main findings of the study are as follows:Compared with before planting, the soil pH, except the Huinan has a modest increase in the southern region after the maize growth period, the other three areas are decreased, and the experimental group(nitro compound fertilizer processing) were greater than the control(the local conventional fertilization treatment). For soil organic matter, organic matter content of the Siping area declined, while the south region and Yushu area increased, Baicheng area of experimental group increased slightly, but the four areas of experimental group were greater than the control group. For soil available P, Siping and cut down the content of available p Baicheng region, Huinan group south area increased, but the control group and the yushu area greatly reduced. For soil available potassium, Siping area rapidly-available potassium content reduced, and larger decline was observed in Huinan region, slight increase in Baicheng region, and great increase in Yushu area. For soil ammonium nitrogen, great reduce was observed in the four districts, and the experimental group fell more than the control group. For soil nitrate nitrogen, Siping area had a decrease, while in Huinan and Yushu, it increased slightly and in Baicheng it increased greatly.The different development stages of the different parts of the experimental group of maize root system related indexes were significantly higher than the control, and with the passage of time presents the increasing trend. Four areas(Baicheng, Yushu, Siping and Huinan) seedling emergence rate were significantly higher than the control. The different development stages of the four areas thick stems in experimental group were higher than in the control.In addition to Siping area at the time of harvest experimental plant height is slightly lower than the control, but other growth periods were higher than the control, the other three areas of experimental plant height in the whole growth period were higher than the control group. The corn leaf SPAD value showed a tendency of increase and then decline with time. At the four main stages of SPAD value of the experimental group is higher than the control. Maize mature leaf SPAD value is still high, present living culm mature corn.For maize yield, in Baicheng, Yushu, Siping and Huinan regions the corn production was 13746 kg/ha respectively, 9269 kg/ha and 10967 kg/ha and 9749 kg/ha, corn yield rate were 25.02%, 4.60%, 14.71% and 25.02% respectively. Except Yushu area, the increase rate of the other three sites was higher than 10%. In addition, four area ratio in the experimental group were higher than in the control group, with the largest in the Baicheng area(9.91), and the smallest in Yushu area(6.68). |
