陇中旱地春小麦不同播量对群体建成及产量的研究  

Effects of different seeding rate on wheat population formation and yield in semi-arid area of Central Gansu

作　　者：逄蕾[1] 黄高宝[1] 郭清毅[1] 王兴龙[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070

出　　处：《甘肃农业大学学报》2004年第4期414-417,共4页Journal of Gansu Agricultural University

基　　金：提高甘肃黄土高原西部雨养农业系统生产力及其可持续发展 (项目编号:LWR2/1999/094)

摘　　要：为探讨陇中旱地春小麦不同播量对群体建成及产量的影响,研究了不同播种量对春小麦生育期、基本苗、分蘖数、叶面积、产量及农艺性状指标的关系,预测了欲获得最高产量的播种量。结果表明,不同播种量对春小麦各生育时期出现的日期无影响, 分蘖数与基本苗、播种量呈显著负相关,春小麦精量稀播比常规播量增产,获得最高产量的播种量为148.35 kg/hm2, 在该播种量水平下可达到的产量为1 146.37 kg/hm2, 比当前播种量的实收产量1 015.12 kg/hm2高131.25 kg/hm2,播种量降低31.65 kg/hm2,产生经济效益约为162.90 元/hm2,并建立了陇中地区春小麦适宜播种量和产量的数学模型:y=-0.051 197 x2+15.190 509 x+19.588 365。The effects of seeding rate on phonology establishment count, tiller number, leaf area index, grain yield, index of agriculture character were studied by field experiments in the semi-arid area of Central Gansu, and the optimum seeding rate to the highest yield was also predicted. The results showed that seeding rate had no effect on phonology development; tiller number had a negative correlation to establishment and sowing rate. The optimum rate should be 148.35 kghm-2, and the yield could account to 1 146.37 kghm-2. It was higher 131.25 kghm-2 than present yield which is 1 015.12 kghm-2, and the economic benefit account for 162.90 yuanhm-2. Mathematic model between wheat seeding rate and yield would be y = -0.051 197 x2 + 15.190 509 x + 19.588 365.

关 键 词：春小麦 播种量 产量 数学模型 经济效益 

分 类 号：S818[农业科学—畜牧学]