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Effects of Different Slow (Controlled) Release Fertilizers on Fertilizer Reduction and Efficiency, Soil Fertility and Enzyme Activity of Rice
LOULing, YUANHangjie, LIDan, SHENJianguo, YANGWenye
PDF(1272 KB)
PDF(1272 KB)
Effects of Different Slow (Controlled) Release Fertilizers on Fertilizer Reduction and Efficiency, Soil Fertility and Enzyme Activity of Rice
To explore the efficiency of different slow (controlled) release fertilizers in rice, this experiment set up four treatments of conventional fertilization, organic slow-release fertilizer, mixed fertilizer, and Yongxiao slow-release fertilizer. The rice yield and soil chemical properties were measured in each plot, and the effects of different slow (controlled) release fertilizers on rice reduction and efficiency, soil fertility and enzyme activity were evaluated by combining with the analysis of soil enzyme activity and other indicators. The results showed that after two consecutive years of trial implementation, when the fertilizer nutrients quantity decreased by 15%, the cost-saving and fertilizer reduction effect of Yongxiao slow-release fertilizer was the best. The content of nitrogen, phosphorus, and potassium in rice grains was basically proportional to the amount of nitrogen, phosphorus, and potassium fertilizer applied in each treatment. After the implementation of the four different treatments, the content of soil organic matter and alkali hydrolyzed nitrogen were increased. The increase amplitudes of the three slow (controlled) release fertilizer treatments were higher than that of the conventional fertilization treatments, while the content of soil available phosphorus and available potassium were decreased after the experiment. After the application of slow (controlled) release fertilizer, the activities of soil urease, protease, phosphatase, and dehydrogenase were higher than those after conventional fertilization. This experiment indicated that the application of slow (controlled) release fertilizer was beneficial for improving the activities of four soil enzymes and improving soil biological characteristics.
slow (controlled) release fertilizers / chemical fertilizer reduction / soil fertility / rice / enzyme activity {{custom_keyword}} /
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