摘要
以密度和氮、磷、钾施用量4因素为研究对象,以小麦种植产量和经济效益为研究目的,采用二次旋转回归组合设计,对优质小麦R88 的高产高效栽培技术进行了栽培试验。结果表明,在黔西北高海拔特殊生态区, 优质小麦R88 产量要获5 000 kg/hm2以上时,栽培措施为:密度292.6~302.4 万株/hm2,施纯N 210.3~230.0 kg/hm2、P2 O5 64.4~82.5 kg/hm2、K2 O81.1~104.0 kg/hm2;当纯收益超过2 500元/hm2 时,栽培措施为:密度271.6~ 290.6万株/hm2,施纯N 181.1~ 199.9 kg/hm2、P2O5 44.5~66.5 kg/hm2、K2O 32.4~51.5 kg/hm2。4因素对产量和经济效益的影响程度大小依次为N>K2O>P2O5 >密度;因素间互作效应分析,N肥施用量是影响R88小麦产量和纯收益的关键措施。
Using the quadratic rotatory regression combination design of four factors and five levels, the effects of planting (density) and amount of nitrogen fertilizer, phosphorous fertilizer and potassium fertilizer on yield and economic benefit of (wheat) (variety) R88 were studied. The results showed that: in particular ecological areas of northwest Guizhou, if R88 yielded beyond 5000 kg/ha, the cultivation measures of planting density 292.6×10~4 ~ 302.4×10~4 plants/ha, N 210.3~230.0 kg/ha, P_(2)O_(5) 64.4^(82.5 kg/ha) and K_(2)O 81.1~104.0 kg/ha should be taken and if its economic benefit beyond 2500 yuan/ha, the appropriate measures should be of planting density 271.6 ×10~4~ 290.6×10~4 plants/ha, N 181.1~199.9 kg/ha, P_(2)O_(5) 44.5~66.5 kg/ha and K_(2)O (32.4~)51.5 (kg/ha). Analysis showed that the order of contributive rate of each factor was N>K_(2)O>P_(2)O_(5)>density on yield and (economic) effect. The key technique was the applying amount of N for higher yield and economic benefit of wheat variety R88.
出处
《贵州农业科学》
CAS
2005年第2期40-42,共3页
Guizhou Agricultural Sciences
基金
毕节地区"十五"科技攻关项目(毕科合字2001 2 1号)
