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| Effects of Different Methods of Fertilizer Application and Cultivation on Ratooning Growth of Low-stubble Rice |
| HUANG Shui-ming |
| (Longyan Institute of Agricultural Sciences, Longyan, Fujian 364000) |
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Abstract We systemically studied the effects of low stubble harvest, different fertilizer application ratios before and after the harvest and different nitrogen application rate after the harvest, different planting methods, field density, the density within the plant to study fertilization and planting methods on rice ratooning growth. The results of different bud and tiller fertilizer application ratios based on orthogonal experiment showed that low-stubble ratoon rice did not apply the fertilizer of bud promotion but only tiller fertilizer before harvest. The optimal nitrogen application rate for tiller promotion was 12kg/667m2 under the medium soil fertility and the fixed N∶P∶K ratio of 1∶0.3∶0.5. The methods of seedling cultivation and field farming suggested that throwing rice seedling from plastic plate was the advantage of increasing effective ratooning tiller rate in the second crop. According to the effects of field density and the density within plant on grain yield, the optimal planting density was 24000 plant per 667m2 and one grain seedling of each plant.
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Received: 13 June 2011
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