冀东晚播高产冬小麦氮磷钾吸收特性的研究

为给冀东地区晚播冬小麦的高产栽培提供依据,以冀东地区主栽小麦品种京冬8号为材料,通过大田试验研究了晚播高产冬小麦氮磷钾吸收特性.结果表明,籽粒产量在8 111.5 kg/ha水平下,平均每生产100 kg籽粒植株需吸收N 2.780 kg、P2O5 1.458 kg、K2O 4.833 kg.拔节期～挑旗期是植株对N吸收强度最大的时期,占总吸收量的41.01%;挑旗期～开花期是植株对P2O5和K2O吸收强度最大的时期,分别占总吸收量的31.77%和35.49%.成熟时植株吸收的N和P2O5 主要贮存在籽粒中,分别占植株总吸收量的58.49%和57.02%;K2O主要贮存在茎秆中,占植株总吸收量的60.30%.不同时期各器官中N、P2O5、K2O的含量不同.

Assimilation Characteristics of N, P2O5 and K2O in Late-sown High Yield Winter Wheat in Eastern Hebei Province

To know the assimilation characteristics of N,P2O5 and K2O in late-sown high yield winter wheat in eastern Hebei Province,the method of combining field experiment with indoor analysis was applied in the study.The results showed that: under the yield level of 8 111.52 kg/ha,to produce every 100 kg grain,the plants should assimilate 2.780 kg N,1.458 kg P2O5,and 4.833 kg K2O.Jointing-flagging stage was the stage in which plants assimilated N at the maximum value,which was of 41.01% of total assimilation value;...