多效唑对大麦抗倒高产的效应及综合栽培数学模型  

THE EFFECTS OF HIGH-YIELD AND LODGING-RESISTANCE OF MET ON BARLEY AND MATHEMATICAL MODELS FOR COMPREHENSIVE CULTURAL PRACTICES

作　　者：曾金国 何立人[2] 李正玮[2] 杜春光[2] 卢吉昌 余建桥[2] 

机构地区：[1]湖南衡阳市农业局 [2]西南农业大学农学系,重庆630716

出　　处：《西南大学学报（自然科学版）》1993年第2期7-11,共5页Journal of Southwest University(Natural Science Edition)

摘　　要：采用多元二次回归正交旋转组合设计,研究多效唑(MET)、施氮量和基本苗数对大麦产量、倒伏的影响,并建立数学模型。结果表明,每公顷产2625～3750kg,倒伏指数.(LI)12～13的高产、抗倒农艺措施为:MET 浓度为250～272mg/kg。施氮量84.3～98.4kg/ha。基本苗168.45～199.65万株/ha。生理拔节期喷施250mg/kg MET,能减轻倒伏,增加产量;还具有降低株高,缩短基部节间长度,明显增加大维管束直径、茎组织厚度、茎的直径,以及促进茎秆物质积累的效应。The cause(s) of preventing lodging and increasing yield by application of multiple cffect triazole (MET) and the cffects of MET,N rate and plant density on yield were stu- died in a mid-stalked barley cultivar 81—18,using the ,otation-regression-orthogonal design.MET spray at the internode elongation stage reduced lodging,shortened the height and internode length of the plant,and increased dry matter weight per unit of stem,basal internode diameter,big vascular and the stem.tissue thickness.Based on the param,.ters ob- tained ,two mathematical models,deseribing the relationship between yield and lodging index (LI) with three cultivating practices were established. barley;lodging resistance;yield; measures; mathematical models

关 键 词：大麦 抗例伏性 产量 措施 数学模型 

分 类 号：S512.3[农业科学—作物学]