30%矮·烯微乳剂对水稻茎秆理化特性的调控  

Effects of Chlormequat-Uniconazole 30% Micro-Emulsion on Stem Physical and Chemical Characteristics of Rice

作　　者：张倩[1] 张明才[1] 张海燕 谭伟明[1] 李召虎[1] 段留生[1] 

机构地区：[1]植物生长调节剂教育部工程研究中心/中国农业大学农学与生物技术学院,北京100193 [2]黑龙江农垦八五零农场,黑龙江虎林158422

出　　处：《作物学报》2013年第6期1089-1095,共7页Acta Agronomica Sinica

基　　金：国家"十一五"科技支撑计划项目(2006BAD02A00);国家高技术研究发展计划(863计划)项目(2006AA10A213)资助

摘　　要：倒伏是限制寒地水稻高产潜力充分发挥的因素之一。试验以垦稻12为材料,于水稻拔节初期叶面喷施30%矮·烯微乳剂,研究其对水稻茎秆形态建成、物质积累及产量构成因素的调控作用。结果表明,30%矮·烯微乳剂1.2Lhm2处理,能够显著缩短茎秆基部第1、第2节间的长度,增加基部节间粗度;显著缩小茎秆细胞宽度,增强细胞排列紧实度;改善茎秆的抗折性,茎秆弯曲折断强度和径向压缩强度比对照分别提高152.4%和82.5%;显著提高水稻齐穗期茎秆基部节间的碳氮比和灌浆后期茎秆中纤维素、半纤维素和木质素含量,显著降低处于固定伸长期的第2节间GA3含量;改善水稻产量构成因素,提高了产量。综上所述,30%矮·烯微乳剂有利于提高水稻茎秆的抗倒伏能力,增加水稻产量。Lodging is one of the most restrictive factors of cold ground rice to achieve higher yield. Using a cultivars Kendao 12 at the early jointing sprayed with a new plant growth regulator 30% chlormequat-uniconazole ME, we studied the effect of it on morphological and physiological characteristics, yield and yield components. The results indicated that 1.2 L ha^-1 treatment of 30% chlormequat-uniconazole ME on rice leaves could markedly shorten the length of basal internodes and increase the diameter of them. In addition, cell microscopy showed that tight degree of cell in 1.2 L ha^-1 treatment was enhanced, and the cells got shorten. Through the improvement of stem morphological characteristics, the bend breaking strength and radial compressive strength were respectively increased by 152.4% and 82.5% as compared with CK. The plant growth regulation could significantly increase the C/N value in the basal internode of stem at full-heading stage; increase contents of hemicellulose, cellulose and liguin of stem at later grain filling stage; significantly reduce GA3 content in the 2nd internodes; and improve rice yield and its compo- nents. Generally speaking, 30% chlormequat-uniconazole ME can enhance the quality of stem to improve lodging-resistance of rice.

关 键 词：30%矮·烯微乳剂 水稻 茎秆 理化特性 细胞解剖结构 产量 

分 类 号：S511[农业科学—作物学]