《Table 6 Use efficiency of fertilizers to the actual yield of rice in the early and late rice croppi

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《Quantitative Evaluation on the Comprehensive Benefit of Controlled-Release Fertilizer in Typically Middle-Low Yield Rice Field》

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The data in the table are mean±standard deviation；the upper and lower case letters indicate significance of difference with the same letter indicating insignificant difference，and different letters indicating significant difference (at the levels of P<0.

As shown in Table 6，in terms of yield，the plot test groups applied with CRF showed yield advantages，and there was no significant difference in the actual yields（kg/hm2）between5 CRF-applied treatments of FVOL，FCAI，FFFP，SVOLand SFFP，but the difference in actual yield of treatment SXNK，which was3 955.35±225.790 4 kg/hm2，reached the significant level.For the treatments applied with CRF，the N utilization rates were SVOL（36.169 8±3.172 8）>SFFP（32.992 8±2.503 0）>SXNK（32.674 4±1.868 1）>LADFFP（23.953 4±1.591 6）>FFFP（21.941 6±1.280 0）>FVOL（21.178 3±1.904 2）>LADVOL（18.763 9±1.101 8）>FCAI（18.630 7±1.487 1）>LADCAI（16.060 2±1.780 7），and SVOLand SXNKshowed significant differences with other treatments（P<0.01）.The P2O5utilization rates of the treatments applied with CRF were LADFFP（42.972 8±1.056 7）>FVOL（36.974 6±1.587 1）>LADVOL（35.746 4±2.095 8）>FFFP（33.660 9±1.960 0）>LADCAI（32.366 9±1.581 5）>FCAI（30.651 5±2.443 5）>SFFP（28.079 0±2.130 9）>SVOL（26.581 9±2.331 6）>SXNK（24.475 1±1.396 5）.The K2O utilization rates of treatments applied with CRF were FFFP（59.565 2±3.470 0）>SVOL（57.882 1±5.077 9）>FVOL（54.529 2±2.336 4）>LADFFP（49.330 7±1.221 1）>SFFP（49.069 1±3.721 7）>FCAI（48.525 6±3.869 6）>LADVOL（43.622 9±2.560 7）>SXNK（43.467 5±2.478 4）>LADCAI（38.542 9±1.881 7）.The variance analysis of F-test with multiple comparisons using Duncan's new multiple range method showed each treatment reached a very significant level（P<0.01）[13].