Experimental study on effect of paper-mulching rice planting technology on saving water and controlling weeds

The effects of paper-mulching rice planting technology on saving water and controlling weed were studied with recycle paper made in Japan, farming paper made in Taiwan of China, and that made in Mainland of China as the covering material and with the baby seedling and general seeding. The results showed that in the whole rice growing period, it saved water by 20.2% by using the technology of paper-mulching rice planting comparing with the technology of without paper-mulching rice planting, under the same condition of paper-mulching, the technique of baby seedling direct sowing saved water by 7.16% compared with the technique of general rice transplanting and there was no notable difference among the 3 kinds of used papers. It was showed that, in the early 40 days of rice seedling growing period, using paper-mulching comparing with without paper-mulching, for the technology of baby seedling direct sowing, the weed density of Watergrass, Tarly watergrall and Bulrush were reduced separately by 97.2%, 77.9% and 50.6%, and for the technology of general rice transplanting, the above 3 kinds weeds density were reduced by 87.5%, 83.8% and 91.5% separately. It showed that there was no notable difference in the height of Watergrass, Tarly watergrall and rice seedling for whether use the paper-mulching, but there was notable difference in the height of Bulrush. It is also showed that there were better effects of Japan recycled paper made in Japan and farming paper made in Taiwan of China on controlling weed height of Bulrush than that of craft paper made in the Mainland of China.