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本试验采用“土植并析”和田间动态观测相结合的方法,研究了水稻半旱栽培的增产效果及机理。结果表明,半旱栽培下,水稻的生长势强,分蘖早、快、多,根系发达。地上地下生长谐调,生物积累多,产量高;土壤一植物的生理、生化和养分变化比淹灌平作谐调。从土壤与品种组合看,常规稻(80—133)适宜于肥力偏低的酸化灰棕紫泥、杂交稻(汕优2号)更适宜于肥力较高的冲积潮泥。
In this experiment, the combination of soil-planting and field observation and dynamic observation in the field were used to study the yield-increasing effect and mechanism of semi-arid rice cultivation. The results showed that under the condition of semi-arid cultivation, the growth of rice was strong, tiller was early, quick and more, and the root system developed. The aboveground and underground growth and harmony, bioaccumulation and high yield; soil-plant physiological, biochemical and nutrient changes than the flooded irrigation level for the harmony. In terms of soil and breed combinations, conventional rice (80-133) is suitable for acidified ash-purple with low fertility, and hybrid rice (Shanyou 2) is more suitable for higher-fertility alluvial mud.