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作 者 ：王惠群1;2;萧浪涛2;李合松1;吴成春1;康朵兰1;杨艳丽2;3

期 刊 ：植物营养与肥料学报 2007年 13卷 6期 页码：1143-1147

关键词：矮壮素；马铃薯；光合特征；磷素营养；

Keywords:chlorocholine chloride, potato, photosynthetic characteristics, phosphate nutrition,

摘 要 ：为进一步研究矮壮素调节马铃薯生长发育及其增产的原因,对出苗后24.d和28.d的马铃薯品种"中薯3号"植株分别喷施矮壮素(CCC)0.g/L(A1,对照)、1.5.g/L(A2)2、.0.g/L(A3)、2.5.g/L(A4)各1次,研究CCC对马铃薯中薯3号出苗后不同天数的光合特征和磷素营养的影响。结果表明:A2、A3、A4处理在出苗后36.d(B1)的叶片净光合速率均低于对照,而A2和A3处理的SPAD值高于对照;A3处理在出苗后46.d(B2)、56.d(B3)和66.d(B4)的净光合速率和SPAD值都最高。应用³²P示踪技术研究表明,在植株的不同部位[叶(C1)、地上茎(C2)、地下茎(C3)和根(C4)]中,处理组合A3B1C1、A3B1C2、A2B1C3和A3B1C4对³²P放射性活度的影响分别与其他相同部位的处理组合有显著差异;在出苗后36.d时,处理A3的根对磷素的吸收量最大,磷素主要运输、分配到地上茎和叶,按各部位相对含量排序,依次为地上茎>叶>根>地下茎。各CCC处理的全株吸磷率随植株的生长而增加,在56.d时全株吸磷率都达到最大值,但在66.d时对磷素的吸收量减少;处理A4、A2和A3在出苗后36.d时的全株吸磷率都高于对照;处理A3的全株吸磷率在出苗后不同天数都高于其他处理。

Abstract:In order to further study chlorocholine chloride(CCC) on causes regulating growth,development and yield of potato,CCC [0 g/L(A1),1.5 g/L(A2),2.0 g/L(A3),2.5 g/L(A4)] was sprayed 24d and 28d after emergence.Effects of CCC on photosynthetic characteristics and phosphate nutrition at different days after emergence [36d(B1),46d(B2),56d(B3),66d(B4)] of variety Zhongshu3 were studied.The results showed that net photosynthetic rate of treatment A2,A3 and A4 at B1 were inferior to that of the control,but SPAD values of treatment A2 and A3 were superior to that of the control.Net photosynthetic rate and SPAD values of treatment A3 were the highest in the four treatments at B2,B3 and B4. With ³²P tracer technology,it was found that in different parts of the plants[leaf(C1),stem(C2),tuber(C3),root(C4)],³²P radioactivity of different parts in Zhongshu3 were significantly different among treatment combination A3B1C1,A3B1C2,A2B1C3,A3B1C4 and other treatments combination.Treatment A3 at B1 increased phosphate absorption,with phosphate being mainly transported and distributed to the stem and leaf.The concentration of phosphate in organs was stem> leaf > root >tuber.The phosphate absorption percentage of a hill in Zhongshu3 increased with age,up to their maximum at B3,but decreased at B4.The phosphate absorption percentage of a hill in Zhongshu3 in order of increase for treatment A4,A2,A3 at B1 were superior to the control.The phosphate absorption percentage of a hill for treatment A3 was the highest of their treatments at different days after emergence.

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