不同浓度羧甲基壳聚糖对水稻氮代谢影响研究.pdfVIP

( ) 植物营养与肥料学报 2007 ,13 4 :597 - 601 Plant Nutrition and Fertilizer Science 不同浓度羧甲基壳聚糖对水稻氮代谢影响研究 刘 强 , 彭建伟 , 荣湘民, 谢桂先 , 朱红梅 (湖南农业大学资源环境学院 ,湖南长沙 410128) 摘要 : 为了解羧甲基壳聚糖对水稻氮代谢的影响 ,采用盆栽试验研究了不同浓度羧甲基壳聚糖对水稻氮代谢 ,子 粒 、糙米的全氮 、蛋白氮含量 ,子粒蛋白质产量的影响 。结果表明 ,喷施羧甲基壳聚糖适宜浓度 ,水稻生殖生长后期 功能叶和茎鞘中氮素转运能力比对照强 ,氮代谢关键酶活性比对照高 ; 糙米中全氮和蛋白氮含量也高于对照 。子 粒蛋白质产量以05 %的羧甲基壳聚糖处理最高 , 比对照增产 198 % 。本试验条件下 , 以羧甲基壳聚糖 05 %浓度 处理效果最好 ,025 %浓度处理效果次之 。 关键词 : 水稻 ; 羧甲基壳聚糖 ; 氮代谢 ; 关键酶 ; 蛋白质 中图分类号 : S51101 　　　文献标识码 : A 　　　文章编号 :1008- 505X (2007) 04- 0597- 05 Effect of carboxymethyl chitosan on nitrogen metabolism of rice LIU Qiang , PENGJianwei , RONG Xiangmin , XIE Guixian , ZHU Hongmei ( ) College of Resources and Environment , Hunan Agricutural University , Changsha 410128 , China Abstract : The effects of different concentrations of carboxymethyl chitosan on rice nitrogen metabolism , grain and brown rice protein contents and grain protein yield were studied. The results showed that applying carboxymethyl chitosan could strongly improve the abilities of transportation of N in functional leaves and stemsheaths of rice and key enzyme activities of nitrogen metabolism and contents of total N and protein N in brown of rice comparing to CK. Applying 05 % concen tration of carboxymethyl chitosan resulted in the highest rice grain protein and which was 198 % higher comparing to CK. Therefore , 05 % carboxymethyl chitosan was recommended for rice production. Key words : rice ; carboxymethyl chitosan ; nitrogen metabolism ; key enzyme ; protein ( ) 　　羧 甲基壳聚糖 Carboxymethyl chitosan 是一种