Abstract:

Zizania latifolia is the primary cash crop in Tongxiang City. In order to optimise the utilisation of existing arable land, enhance the replanting index and identify a scientific and efficient cultivation mode, three Zizania latifolia and one late rice varieties were selected as experimental varieties to study the new technology model of Zizania latifolia-rice double cropping. The results showed that transplanting double-season Zizania latifolia seedlings on November 24th, applying additional fertilizer 3~4 times after the Zizania latifolia regrow in the second year, allows for harvesting the Zizania latifolia in May and June. Planting Shangshida 19 late rice variety between July 10th and 20th enables harvesting the rice in November. Three Zizania latifolia varieties were identified as suitable for Zizania latifolia-rice double cropping system. It is crucial to plant the double-season Zizania latifolia variety Longjiao 2 and late rice variety Shangshida 19 as test varieties initially to obtain the highest total output value, with a total output value of 11 248.05 yuan per 667 m². The output value of Zizania latifolia was 8 699.65 yuan per 667 m², while that of late rice was 2 548.4 yuan per 667 m², representing the best combinations in the experiment.

Key words: Zizania latifolia, late rice, stem tube