不同腐解方式下棉秆腐解液对棉花种子萌发的化感效应  

Allelopathy Effect of Decomposed Liquids of Cotton Stalk Under Different Decomposing Modes on Cotton Seeds Germination

作　　者：张琴[1,2] 李艳宾[1,2] 李勇 聂金凤[1] 岳静[1] 张利莉[1,2] 

机构地区：[1]塔里木大学生命科学学院,新疆阿拉尔843300 [2]塔里木大学新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔843300 [3]新疆塔里木河种业股份有限公司,新疆阿克苏843300

出　　处：《种子》2011年第4期17-21,共5页Seed

基　　金：国家"973"计划前期研究专项(2007CB116303);国家自然科学基金项目(30960071)

摘　　要：针对新疆棉区长期连作与棉花秸秆还田的普遍现象,分别采用自然腐解与接种微生物人工腐解的方式处理棉秆,研究了2种腐解液对棉花种子萌发的化感作用。结果表明,棉秆自然腐解液对棉花种子萌发具有较强的自毒作用,在腐解液浓度达到5 g/L时,种子发芽率与发芽指数即开始显著(p<0.05)降低;而已发芽种子的生长活力受影响较小,可耐受高达30 g/L的腐解液浓度。经人工腐解,棉秆腐解液的自毒化感效应得到极大消除,在50 g/L腐解液浓度的试验范围内,种子萌发率未受显著抑制,反而发芽种子的活力指数及胚根干重均有极显著增加(p<0.01)。两种腐解方式下种子萌发情况的差异性检验表明,人工腐解处理的种子发芽势、发芽率、发芽指数与活力指数等指标值较之自然腐解处理有极显著增高(p<0.01),胚根干重增加显著(p<0.05)。Cotton long-term continuously cropping and cotton stalk returning to field are general in Xinjiang,China.Two modes were designed in this research：natural decomposition and microbial inoculation methods to decompose cotton stalk,and allelopathy of the decomposed liquids on cotton seeds germination was studied.The results showed that natural decomposed liquids showed strong autotoxity on cotton seeds germination,as concentration of the decomposed liquids reached 5g/L,seeds germination rate and germination index started to decrease significantly（p0.05）.While the growth vigor of germinated seeds were affected less,the germinated seeds could even bear the decomposed liquids concentration up to 30g/L.In artificial decomposition,the autotoxity of decomposed liquids was eliminated to a large extent,the decomposed liquids still showed no significant inhibiting effects on seeds germination rate achieved the concentration of 50g/L even,on the contrary,the vigor index and radicle dry weight of the germinated seeds increased very significantly（p0.01）.The different results of seeds germination in two decomposition mode indicated that the seeds germination energy,germination rate,germination index and vigor index in artificial decomposition were heightened very significantly（p0.01）,and the radicle dry weight increased significantly（p0.05）.

关 键 词：棉秆 腐解方式 腐解液 棉花种子萌发 化感效应 

分 类 号：S562[农业科学—作物学]