Effect of Application of Phosphorus Combined with Nitrogen Fertilizer on Senescence Characteristics and Yield after Anthesis in Super-high-yielding Wheat

doi:10.7668/hbnxb.2009.04.031

Abstract

Abstract: A field experiment was conducted on super2high2yielding conditions to evaluate the effects of application of phosphorus combined with nitrogen fertilizer on photosynthetic characteristics and yield after anthesis in super2high2 yielding wheat. The results indicated that application of senescence characteristics combined with nitrogen fertilizer adjust greatly photosynthetic characteristics and yield after anthesis in super2high2yielding wheat. Pn,chlorophyll content (SPAD value),PRO and SOD were downtrend after anthesis in wheat,but that of the fertilizer treatments dropped slowly at the early stage reached significant level compared to the control,and N1P2,N2P2 were extremely significant ;At the begin2 ning,MDA was grew slowly, increased rapidly after anthesis 14 d ;POD was a trend of rise first,then fall. Enzyme activity were enhanced with the increasing rates of fertilizers,but MDA was increased. However,surplus rates of fertilizers (P2O5 = 225 kg/ ha) accelerated the leaf senescence,grains per spike and 10002grain weight,which leaded to yield reduction.With statistical analysis,application of phosphorus combined with nitrogen fertilizer had extremely significant interaction effects on Pn,SPAD value,SOD and so on. The highest grain yield was observed in the treatment with N 300 kg/ ha applied,P 150 kg/ ha.

Key words: Super2high2yielding wheat, Application of phosphorus combined with nitrogen fertilizer, Senescence, In2 teraction effects, Yield

CLC Number:

S143

ZHAO Hai-bo, LIN Qi, LIU Yi-guo, JIANG Wen, LIU Jian-jun, ZHAI Yan-ju. Effect of Application of Phosphorus Combined with Nitrogen Fertilizer on Senescence Characteristics and Yield after Anthesis in Super-high-yielding Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(4): 158-162. doi: 10.7668/hbnxb.2009.04.031.

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