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Study on the Growth and Development of Rice Root System and Rice Yield under Upland Cultivation

Zhang Yuping et al (Agronomy Department of Anhui Agricultural University, Hefei 230036)  
The growth and development of root system of paddy rice and upland rice were studied in the experiment farm of Anhui Agriculture University in 1999. The results showed that: the weight of dry rice roots under upland cultivation was highly accumulated in the later growth period,and during the growth process the changes of root activity appeared with one-peak curve, with the maximum value at the jointing stage. And also, it showed that the root activity without coveredby plastic film was greater than that with covered. The total area and active absorption area of root system were increased before jointing stage,then decreased;The respiratory intensity of the root system covered with plastic film was greater than that without covered
【Fund】: 安徽省自然科学基金和省“九五”攻关项目
【CateGory Index】: S511
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