摘要
在覆盖补水条件下 ,设置了不同覆盖方式、不同补水时期、不同追肥时期和不同施肥量等试验。结果表明 ,地膜穴播产量较高 ,较对照增产 41 .3% ,比膜侧条播增产 2 1 .1 %。在覆盖基础上 ,底墒较差时 ,越冬前补水较对照增产 30 .5% ;底墒较好时 ,拔节期补水较对照增产 1 5%以上。在覆盖补水前提下 ,将常规的一次性施肥分别改为拔节、越冬和孕穗 3个时期追肥 ,拔节期追肥产量比对照增产 1 4.3% ;越冬追肥增产 9.0 %。不同化肥施用量 ,N30 0 P30 0K2 4 0 产量较 CK增产 2 0 .0 % ;次为 N150 P30 0 K12 0 和 N150 P2 2 5K12 0 ,再次为 N2 2 5P2 2 5K180 和 N150 P150K12 0 。在不同施氮水平 (纯 N75kg/hm2 ～ 30 0 kg/hm2 )和不同施 K2 O水平 ( K2 O60 kg/hm2 ～2 4 0 kg/hm2 )中 ,产量随着施磷量的增加 ( P2 O575kg/hm2 ～ 30 0 kg/hm2 )而增加。
Experiments of different mulching models, subsurface irrigation times, fertilizer topdressing and application rate were made during 1997~2000. Results show that wheat yield of bunch planting on plastic film increase 41.3% over traditional planting, 21.1% over row planting beside plastic film. Under the mulching, wheat yield of subsurface irrigation before winter can increase 30.5% over traditional management when rainfall is small before planting wheat. Wheat yield of subsurface irrigation during elongation stage can increase 15% over traditional management when it is rainy before planting wheat. Combining base fertilizer with topdressing can increase wheat yield. Topdressing during elongation stage can increase wheat yield by 14.3% over single base fertilization. By the way, adding phosphate fertilizer is very useful to enhance wheat yield.\;
出处
《干旱地区农业研究》
CSCD
北大核心
2001年第2期1-8,共8页
Agricultural Research in the Arid Areas
基金
山西省科委科技攻关项目! (963 1 3 6)
关键词
小麦
覆盖
补水
追肥时期
施肥量
旱地
wheat
mulching
subsurface irrigation
fertilization
dryland
