Effects of Nitrogen Management and Its Combined Application with Silica and Zinc Fertilizer on Yield and Quality of Rice Variety Xiadao 1
In order to explore the cultivation technique for synergic improvement of yield and quality of indica rice Xiadao 1,three different nitrogen fertilizer management treatments combined with silicon and zinc fertilizer were set up under the nitrogen application rate of 180 kg/hm2,namely the nitrogen fertilization mass ratios of basal fertilizer,tillering fertilizer,panicle fertilizer were 7∶3∶0,5∶3∶2 and 3∶3∶4(referred as N7+3+0,N5+3+2 and N3+3+4,respectively).The effects of different nitrogen fertilizer application methods and its combination with silica and zinc fertilizer on yield and quality of Xiadao 1 were studied.The results showed that the overall trend of yield was ranked as N7+3+0＜N5+3+2≈N3+3+4.With the increasing proportion of nitrogen fertilizer in panicle fertilizer,the brown rice rate,milled rice rate and head rice rate of Xiadao 1 increased first and then decreased,but the gel consistency and protein content of polished rice were on the rise.Besides,the nitrogen fertilizer application significantly influenced the head rice rate,and the effect on the protein content reached an extremely significant level.Under the same nitrogen fertilizer application method,combined application of single silicon fertilizer and combined application of silicon and zinc fertilizer showed a certain yield increase effect,but the effect on rice quality index did not reach a significant level.In conclusion,the N5+3+2 treatment could realize the synergistic improvement of the yield and quality of Xiadao 1,and the combined application of silicon and zinc fertilizer is conducive to the further improvement of the yield.
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