To explore the effects of phosphorus application rate and irrigation amount during flowering stage on wheat grain filling characteristics and yield in the middle and low-yield fields in southern Hebei,a field ex-periment was conducted during the 2020-2021 growing seasons.The study investigated the combined effects of two phosphorus application rates(P1:P2 O5 112.5 kg/hm2,P2:P2 O5168.75 kg/hm2)and three irrigation a-mounts(W0:no irrigation,W1:irrigation 375 m3/hm2,W2:irrigation 750 m3/hm2)on wheat grain-filling characteristics and yield.The results showed that an increased amount of phosphorus application significantly in-creased both spike number and yield.An increased irrigation amount during the flowering stage significantly im-proved the leaf function at the late flag leaf stage,the maximum grain growth,the number of grains per spike and yield.There was a certain interaction between the amount of phosphorus application and the irrigation amount at the flowering period.There was no significant difference in flag leaf traits,grain-filling characteristics and wheat yield under the condition of more phosphorus and less water or more water and less phosphorus.Based on the comprehensive analysis,P2W2(P2 O5:168.75 kg/hm2,irrigation at flowering stage:750 m3/hm2)can be used as a reference measure for water and phosphorus management of high-yield wheat cultivation in middle and low-yield fields in this region.P2W1(P2 O5:168.75 kg/hm2,irrigation at flowering stage:375 m3/hm2)can be used as a reference measure for water and phosphorus management of water-saving and stable yield cultivation of wheat in middle and low-yield fields in this region.
NETL
NSTL
万方数据
