CAJ | 학술논문

运用对通州区的调查资料和试验结果,分析了不同典型种植模式对0-2 m土壤矿质氮累积量的影响.结果表明,不同种植模式对0-2m土壤矿质氮提取利用能力顺序为:向日葵-向日葵>冬小麦-夏玉米(玉米秸秆还田)>冬小麦-夏玉米(玉米秸秆不还田)>冬小麦-大豆>玉米-玉米.在大田作物生产中,应进行合理的作物轮作、增加地面覆盖度、轮作中加入有固氮能力的豆科作物、注重与根系发达或深根作物进行轮作,能有效地提取利用土壤深层NO_3~---N,并能有效减少氮素向土壤下层的淋洗.蔬菜生产田0-2 m土壤含有较高的NO_3~--N和NH_4~+-N,累积量达1935.03 kg/hm~2和201.8 kg/hm~2,因此,应通过减少氮肥投入量,优化轮作种植模式以提高作物对深层土壤NO_3~--N的回收利用.
운용대통주구적조사자료화시험결과,분석료불동전형충식모식대0-2 m토양광질담루적량적영향.결과표명,불동충식모식대0-2m토양광질담제취이용능력순서위:향일규-향일규>동소맥-하옥미(옥미갈간환전)>동소맥-하옥미(옥미갈간불환전)>동소맥-대두>옥미-옥미.재대전작물생산중,응진행합리적작물륜작、증가지면복개도、륜작중가입유고담능력적두과작물、주중여근계발체혹심근작물진행륜작,능유효지제취이용토양심층NO_3~---N,병능유효감소담소향토양하층적림세.소채생산전0-2 m토양함유교고적NO_3~--N화NH_4~+-N,루적량체1935.03 kg/hm~2화201.8 kg/hm~2,인차,응통과감소담비투입량,우화륜작충식모식이제고작물대심층토양NO_3~--N적회수이용.
The effects of different cropping systems on soil inorganic nitrogen accumulation was analyzed using survey and experiments date. The results showed that the ability to recover nitrogen fertilizer under different cropping systems was as follows: continuous sunflower > wheat-corn rotation (field covered with crops) > wheat-corn rotation (without covering) > wheat-soybean rotation > continuous corn. Reasonable rotation (I. E. Rotation with N_2-fixing legumes, rotation with deep-rooted crops) and stubble-mulch, were recommended because they could utilize NO_3~- -N from the subsoil, prevent losses of nutrients from leaching. The amount of NO_3~- -N accumulation and NH_4~+ -N accumulation in vegetable field in 0-2 m soil layer was 1935.03 kg/ha and 201.8 kg/ha respectively. The high concentration of residue NO_3~- -N indicated that the rate of N input should be reduced, and cropping sequence should be adopted to enhance the utilization efficiency of NO_3~- -N from the soil at depths below the rooting zone.