Rice residues

The unharvested parts of rice plants are generally mixed with the soil because this has been thought to be beneficial. It has been observed however, that productivity of the second crop of rice in a paddy is less than that of the first crop. Chou and Lin (45) found that aqueous extracts of decomposing rice residues in soil retarded radicle growth of rice seedlings and growth of rice plants. Maximum toxicity occurred in the first month of decomposition and declined thereafter. Some toxicity persisted for four months in the paddies. Five inhibitory phenolic acids were identified from decaying rice residues and several unidentified allelochemicals were isolated. 

During the decomposition of rice residues in amount of available minerals might be... 

The rice husk-based bioelectricity hfe cycle starts with the production of agricultural inputs such as rice seed, fertihzer, and pesticide, which then are used for rice farming. After the rough rice grains are harvested, rice husk is separated from brown rice [44]. While the brown rice is normally processed to obtain white rice for commercial purpose, the rice husk is directly transported to the power plant for generating electricity. The operation of rice husk-based power plants is similar to that of coal-based power plants. Nevertheless, as rice husk tends to contain less sulfur than coal, limestone consumption is omitted when considering the rice residue-based power plant. 

Do DT. Assessment of potential biomass energy from rice residues in Vietnam (in Vietnamese). In Paper presented at forum on energy and petrol investment and sustainable development May 09, 2013 [Hanoi, Viemam]. 

Brewer s grains, or draff, consist of the insoluble residue left after removal of the wort. In addition to the insoluble barley residue, this product may contain maize and rice residues and, because of this, the composition of the product can be very variable, as illustrated in Table 22.3. 

CHOU C.H. and LIN H.J. 1976. Auto-intoxication mechanism of Oryza sativa, 1. Phytotoxic effects of decomposing rice residues in soil. Journal of Chemical Ecology, 2, 353-367. 

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