窄行距插秧机田间试验效果分析

Effects of Field Trial with Narrow Row Spacing Transplanter

本文针对南方双季稻区的常规稻种植是否应该减小机插行距的问题,采用随机区组试验设计,在30cm和25cm行距下,设计了不同行距同株距和不同行距同穴数两组对比试验。试验结果显示,当株距在13cm时,25 cm行距的产量要明显高于30 cm;株距在18 cm时,30 cm行距的产量要高于25 cm。当穴数在1.4万穴/667 m2和1.6万穴/667m2时,30cm行距的产量均高于25cm。从产量、经济性、标准化等多方面综合考虑,虽然肯定局部地区尝试缩小行距的做法,但30cm行距插秧机依然是今后的主流机型,不宜大范围进行改变。

With the problem of whether it should reduce the row spacing of mechanized transplanting in southern China, especially for conventional rice in double cropping areas,by using the randomized block experiment design,two field trials of different row spacing with the same plant spacing and different row spacing with the same number of plants were conducted. The results showed that the yield of 25cm row spacing was higher than that of 30cm with 25cm plant spacing, while the yield of 30cm row spacing was higher than that of 25cm with 18cm plant spacing. The yield of 30cm row spacing was higher no matter the plant number was 14000 /667m^2 or 16000 /667m^2. Taking into account of different aspects of yield,economy,standardization etc.,transplanter with 25cm row spacing can be used in specific regions,but transplanter with 30cm row spacing is still the mainstream models. A wide range of changing the row spacing is not recommended.