The effects of pig manure compost combined with chemical fertilizer on rice yield and nitrogen efficiency were studied through field experiments. The results showed that under the experimental conditions, the combined application of pig manure compost and chemical fertilizer could significantly improve rice yield and increase the number of filled grains per panicle. Especially1500 kg hm-2 pig manure compost+chemical fertilizer treatment, the rice yield reached 8595 kg hm-2, which was 57.8% higher than that of no nitrogen fertilizer and 13.6% higher than that of chemical fertilizer treatment, and the difference reached a significant level. The nitrogen nutrition efficiency of rice treated with pig manure compost and chemical fertilizer is higher than that of chemical fertilizer treatment. The nitrogen recovery rate of pig manure compost combined with chemical fertilizer is 35.3%~38.6%, while that of chemical fertilizer treatment is only 27.6%.

The above data are all from scientific reports and have sufficient scientific basis.

Effects of pig manure compost combined with chemical fertilizer on rice yield and nitrogen efficiency

Wang Qiang Huang Qi are Yang Xingming, Xu Yangchun and Shen Qirong.

Author: College of Resources and Environment of Nanjing Agricultural University Jiangsu Tianniang Agricultural Science and Technology Co., Ltd. College of Resources and Environment of Nanjing Agricultural University College of Resources and Environment of Nanjing Agricultural University

Key words: chemical nitrogen fertilizer for pig manure composting, rice yield composition, nitrogen nutrient distribution efficiency, nitrogen fertilizer application efficiency, nitrogen utilization efficiency, nitrogen accumulation with different treatment utilization efficiency.

Fund projects: major scientific and technological key project of Jiangsu Province (BE2005369), major international cooperation project of the Ministry of Agriculture (2006-G62) and support plan project of the Ministry of Science and Technology (2006BAD 10B09).

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