高产夏玉米施用硫肥对矿质元素吸收影响的研究

Effects of Sulfur Application in High Yield Summer Maize

每公顷基施 :0 (CK)、36 .3(S1)、4 13.85 (S2 )kg硫时 ,玉米每公顷产量分别为 9784 .5、10 6 39.5、1132 2kg,处理分别比对照增产 8.73%和 15 .71% ,并提高了果穗长度 ,增加了穗行数、行粒数 ,对千粒重影响不大。单株对氮、磷、钾、锰、锌、镁的吸收量表现为S2 >S1>CK。施入 (NH4) 2 SO4后 ,0～ 2 0cm、2 1～ 4 0cm、4 1～ 6 0cm土层的pH值降低 ,收获后有所回升 ,各处理各土层的pH值均表现为CK >S1>S2 。施入硫肥后 ,0～ 6 0cm土层全氮含量降低 ,速效钾的含量提高 ,0～ 2 0cm土层中的速效磷含量有所提高 ,2 1～ 4 0cm土层变化不大 ,4 1～ 6

CK)?36.3(S1)and 413.85(S 2)Kg of sulphur applied per hectare. In field experiment,the yield got 9 784.5 ?10 639.5 and 11 322 Kg per hectare ,respectively. S 1 and S 2 treatments gave 1.087 3 and 1.157 1 times grain yield of CK. The application of sulphur increased ear length, rows ear -1 , grains row -1 and grains ear -1 . But, S produced little increasment of grain weight. N,P,K,Mn,Zn,Mg absorption in a plant as well as Fe,Mn,Zn content in function leaves increased with amount of sulphur applicated.Application of (NH 4) 2SO 4 decreased pH in soil layer of 0～20 cm,21～40 cm and 41～60 cm in spit of slightly raise of it. At harvesting, sulphur fertilizer induced content of total N and raise content of active K in 0～60 cm soil layer.Sulphur fertilizer slightly enhance content of active P in 0～20 cm soil layers,little variation in 21～40 cm soil layers and slighty decrease in 41～60 cm soil layer.