《Table 3 the rate of yield increase was than no N fertilizer and urea only》

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《Yields and Nitrogen Use Efficiencies of Rice (Oryza sativa) at Different Sites Using Different Nitrogen Fertilizer Application Rates and Controlled-release Urea to Conventional Urea Ratios》

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CRU∶RU=70%∶30%；CRU∶RU=50%∶50%；CRU∶RU=30%∶70%；CRU∶RU=100%∶0.0%；CRU∶RU=0.0%∶100%.1-5 treatments:105 kg N/hm2；6-10 treatments:150 kg N/hm2；11 treatment:0 kg N/hm2，the same below.

The yield-promoting effects of the fertilizer treatments are shown in Table 3.The yield was higher when fertilizer was applied than when fertilizer was not applied，but the yields for each treatment were different at the different sites.The nitrogen application rates of 105 and 150 kg/hm2increased the yield relative to the CK yield by 23.52%and 34.68%，respectively，in Guanghan，48.84%and 54.84%，respectively，in Zhongjiang，20.16%and22.9%，respectively，in Wenjiang，11.14%and 8.24%，respectively，in Mangshi，and 42.02%and 50.96%，respectively，in Suiyang.The different responses were related to the different fertilities and environmental conditions at the different sites.