马铃薯不同品种氮、磷、钾与硫素吸收规律的研究

Absorption and Distribution of N, P, K and S in Various Varieties of Potato

以紫花白、夏波蒂、底西瑞为材料,采用田间试验与室内分析测定相结合的方法,对马铃薯不同品种氮、磷、钾、硫素的吸收、分配规律进行了系统的研究,结果表明:①在整个生育进程中马铃薯植株中氮、钾积累量表现为"M"型变化趋势,磷、硫积累量则表现为单峰曲线的变化趋势。②紫花白品种氮硫比随生育进程的推进呈"高-低-高-低"的变化趋势,底西瑞和夏波蒂品种的氮硫比随生育进程的推进呈波状变化,但两品种波峰和波谷出现的时期及次数均不同;紫花白和夏波蒂磷硫比的变化趋势相同,均为波状曲线变化,最大值分别出现在出苗后75d和95d,比值分别为4.60和4.09,底西瑞的磷硫比表现为"高-低-高-低"的变化趋势,出苗后95d时达到一生中的最大值6.34;3品种整个生育期间的钾硫比变化均表现出波状的变化趋势,波峰和波谷出现的次数和时期各不相同。③马铃薯氮、磷、钾素的积累与硫素积累之间存在着极显著的幂函数关系,即马铃薯氮、磷、钾素的积累量随硫素积累量的增加而呈幂函数增加。

The absorption and distribution of nitrogen （N）, potato of the varieties, Zihuabai, Shepody and Desiree, were growth period of potato, the quantification of N and K changed phosphorus （D）, potassium （K） and sulphur （S） in systematically studied in field experiment. In the like＂M＂, but the quantification of P and S showed single-peak curve tendency. The ratio of N to S in Zihuabai showed ＂high-low-high-low＂ pattern, but for Disiree and Shepody, it showed a flexuosity tendency. The ratio of P to S in Zihuabai and Disiree showed the similar flexuosity, and reached the maximal value, 4.60 and 4.09, respectively, 75 d and 95 d after emergence. The ratio of P to S in Disiree showed ＂high-low-high-low＂pattern, with the peak value 6.43 appearing 95 d after emergence. The ratio of K to S in all of the three varieties showed the similar flexuosity pattern, but with different peaks and time when the peak appeared. The accumulation of S was highly significantly correlated with the accumulation of N, P and K.