减源对甜高粱光合产物生产和分配的影响  

Effects of Leaf Removal on Dry Matter Accumulation and Participation of Sweet Sorghum

作　　者：池云花[1] 王空军[2] 蒋高明[1,2] 吴秋平[2] 石雷[1] 

机构地区：[1]中国科学院植物研究所,北京100093 [2]山东农业大学农学院,山东泰安271018

出　　处：《华北农学报》2010年第B08期139-143,共5页Acta Agriculturae Boreali-Sinica

摘　　要：为了探明甜高粱中下部叶片对其糖产量的影响及其茎秆是否具有一定的竞争能力,以甜高粱丽欧为试验材料,采用所有叶片剪去一半,剪去上数1～5叶及剪去上数6～10叶3个处理方式,研究处理对茎秆糖产量及穗生物量的影响。结果发现减源处理使得光合产物的供应减少,这导致甜高粱茎秆生物量的显著下降,但是对穗干物质积累和茎秆糖含量没有影响。减源处理导致茎秆可溶性糖产量的下降是由于茎秆生物量的下降而引起。各种剪叶处理都对茎秆糖产量有显著影响,并且剪中下部叶片的影响稍大于剪上部叶片,所以,对甜高粱来说,中下部叶片同样重要。穗至少在建成之后相对于茎秆具有绝对竞争优势。在今后的育种过程中,培育直立型叶片,改善中下部叶片的受光状况;减小穗部是提高产量的可选途径。To test the importance of the lower leaves of sweet sorghum to yield of stem sugar.Sweet sorghum Rio was treated with defoliation including cutting half of all leaves,cutting upper 5 leaves and cutting upper 6-10 leaves.All treatments reduced the stem weight,yield of stem sugar,but had no effect on panicle weight and sugar content in stem.Treatment of cutting lower leaves reduced more stem weight and yield of stem sugar than the treatment of upper leaves removal.Thus,our experiment revealed that the lower leaves had more important contribution to sugar yield of sweet sorghum and the panicle had higher competitive advantage to photosynthetic product than stem.To improve stem sugar yield of sweet sorghum,therefore,new cultivars with little panicle and erect upper leaves are suggested in future breeding.

关 键 词：甜高粱 剪叶 生物量 糖含量 糖产量 

分 类 号：S514.01[农业科学—作物学]