辽西褐土施肥及养分循环再利用中长期试验Ⅴ.不同降水年景作物产量对施肥的反应和水肥交互作用  

Long-term trial on fertilization and on use of recycled nutrients in farming systems Ⅴ. Response of crop yields to fertilization in different precipitation years and estimates of water and nutrient interaction

作　　者：张璐[1] 沈善敏[1] 宇万太[1] 廉鸿志[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《应用生态学报》2003年第12期2205-2207,共3页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目(NKBRSF;G19990 1180 4);中国科学院知识创新重大项目(KZCX2 413 4);中国科学院"九.五"重点基金资助项目(KZ95 2 JI 2 14 )

摘　　要：通过比较平水年 ( 1996年 ,作物生长期降水 4 5 6mm)和丰水年 ( 1998年 ,作物生长期降水 5 98mm)作物对施肥的增产反应 ,初步估算了辽西半湿润 半干旱地区水肥交互作用对作物增产的贡献 .结果表明 ,施氮肥并增加水分供给 (降水增加 ) ,作物增产 (玉米、大豆 ) 30 5 6kg·hm-2 ,其中 1996kg·hm-2 来自水肥交互作用 ,占 6 5 .3% .施NP和堆肥并增加水分供给 ,作物增产 4 70 3kg·hm-2 ,其中 15 5 4kg·hm-2 来自水肥交互作用 ,占 33% .According to the responses of crop yields under fertilizations in 1996 with normal precipitation (456 mm in crop growth season) and in 1998 with higher precipitation (598 mm in growth season),the effect of water and nutrient interaction on crop yields in semihumid semiarid region of west Liaoning Province were estimated. Under N application and sufficient water supply (more rainfall),the increase of crop yields was 3 056 kg·hm -2 ,of which,1 996 kg·hm -2 was estimated from water nutrient interaction,while in NP and compost treatment with sufficient water supply,the yield increase was 4 703 kg·hm -2 ,of which,1 554 kg·hm -2 was estimated from water nutrient interaction.

关 键 词：长期肥料试验 作物产量 水肥交互作用 

分 类 号：S152.7[农业科学—土壤学]