Effects of Nitrogen Fertilizer Supply Way on Growth and Nitrogen Use Efficiency(NUE) in Summer Maize

doi:10.7668/hbnxb.2010.S2.040

Abstract

Abstract: "The effects of 4 different nitrogen fertilizer supply ways on growth and NUE in summer maize were studied under the rate of 180 kg/ ha,which were N180(basal∶ 12-leaf =1∶ 2),N180(basal∶ silking stage=1∶ 2),N180(8-leaf∶ silking stage=2∶ 1),N180(8-leaf∶ 12-leaf=1∶ 1).The results were that treatment of N180(basal∶ 12-leaf =1∶ 2)had the bigger 1000 Grain Weight,lower percentage of Plant without ear,higer yield than other treatments.Dry matter and nitrogen accumulated rapidly after silking stage in the treatment of N180(basal∶ 12-leaf =1∶ 2),so it achieved higher NUE.Due to the small LAI in the silking stage and small amount of dry matter accumulated in the early stage,yield of N180(basal∶ silking stage=1∶ 2)decreased.N180(8-leaf∶ silking stage=2∶ 1)was similar with N180(8-leaf∶ 12-leaf=1∶ 1)in the yield performance,and N180(8-leaf∶ silking stage=2∶ 1)had a higer NUE.Grain number per ear of N180(8-leaf∶ 12-leaf=1∶ 1)decreased distinctly than other treatments which resulted in decline of yield.Amount of dry matter and nitrogen accumulation in N180(8-leaf∶ 12-leaf=1∶ 1)were small hence low in the NUE.it can conclude that the treatment of N180(basal∶ 12-leaf =1∶ 2)that increase yield and NUE synchronously was a superior nitrogen fertilizer supply way. "

Key words: Summer, Maize nitrogen supply way, Grainyield, NUE

CLC Number:

S513

ZHANG Li-li, WANG Pu, TAO Hong-bin. Effects of Nitrogen Fertilizer Supply Way on Growth and Nitrogen Use Efficiency(NUE) in Summer Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(S2): 177-181. doi: 10.7668/hbnxb.2010.S2.040.

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