Effect of Different Plant Growth Regulators on the Stem Characteristics and Yield in Winter Wheat

doi:10.7668/hbnxb.2015.S1.027

Abstract

Abstract: Field experiments were conducted to study effect of spraying different plant growth regulators on the stem characteristics and yield of winter wheat.We set spraying 175 mg/kg Paclobutrazol(SP1),300 mg/kg Cycocel(SP2),350 mg/kg Maijujin(SP3),333 mg/kg Jinfeng(SP4),300 mg/kg DPC(SP5),333 mg/kg Bihu(SP6) and water control 7 treatments,the wheat plant height,internode length,stem diameter,dry weight of stem,lodging resistance,yield and yield components were analyzed.The results showed that,different plant growth regulators reduced plant height,enhanced basal stalk resistance and lodging resistance,lodging resistance:SP3 >SP6 >SP4 >SP1 >SP5 >SP2 >CK.The effect of different treatments on wheat basal internodes length:1st internode >2nd internode >3rd internode.The grain yield of winter wheat:SP3 >SP5 >SP6 >SP1 >SP2 >CK >SP4,among them SP3 and SP5 treatments remarkably increased grain yield by 3.2% and 2.3%,respectively.Different treatments had larger effect on effective spike number and grain number per spike,and smaller effect on 1000-grains weight.2013-2014 year winter wheat under the condition of no lodging place,the results of spraying with Paclobutrazol and DPC were better than other growth regulators.

Key words: Plant growth regulators, Winter wheat, Stem characteristics, Yield

CLC Number:

S512.01

YAO Hai-po, DONG Zhi-qiang, LÜ Li-hua, SHEN Hai-ping, YAO Yan-rong, ZHANG Li-hua, JIA Xiu-ling. Effect of Different Plant Growth Regulators on the Stem Characteristics and Yield in Winter Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(S1): 152-156. doi: 10.7668/hbnxb.2015.S1.027.

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