摘要
研究了不同施肥处理对生长7年的3个紫花苜蓿品种的产量及土壤养分的影响。结果表明,氮、磷配施和单施钾肥对苜蓿均有显著的增产效果,不同施肥对不同品种的生产力影响效果不同。N30P120处理巨人201＋Z和牧歌401＋Z产量最高,分别比对照增产41.1%和74.8%;单施K60处理,路宝比对照增产了76.7%。种植苜蓿可以提高土壤氮的有效性,生长7年的苜蓿根系固氮在土壤仍有累积。种植苜蓿,不施肥处理土壤全氮含量均有不同程度的增加,而土壤全磷和全钾略有下降。3个品种苜蓿的土壤速效磷含量随磷肥用量的增加而增加,N30P120处理土壤速效磷增加11.454-1.7 mg/kg;单施钾肥,土壤速效磷含量提高了3.714-.41 mg/kg,全钾含量增加了0.06-1.69 mg/kg。
The report studied the effects of different fertilizer treatments on the growth of the 7th years-old of 3 different production performance alfalfa（ Medicago sativa ） varieties, as well as changes in soil nutrients. The results showed： NP combined application and K fertilization alone can significantly increase the yield of all different alfalfa varieties. Different fertilization shows different impact on the productivity of different varieties. When applied N30P120, the highest forage production was obtained for both Ameri Stand 201 ＋ Z and Ameri Graze 401 ＋ Z reached, increasing 41.1% and 74.8% more than that of non-fertilizer respectively. When applied K60, Lobo will gain the largest production increase （76.7%）. Planting alfalfa can improve the soil N availability, and it is accumulated in soil that the nitrogen was firmed by roots of the 7th years-old alfalfa （sentence is not clear）. The soil N content of non-fertilization increases with alfalfa planting, but total P, total K in soil decreased. The impacts of fertilization on soil fertility are different with different alfalfa varieties planting. The soil available P content increases with increases of P fertilization. Applying K alone can raise the soil available P content （3.71-4.41 mg/kg） and total K content （0.06-1.69 mg/kg）.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2009年第6期1413-1418,共6页
Journal of Plant Nutrition and Fertilizers
基金
"十一五"国家科技支撑计划(2006BAD29B03)
陕西省自然科学基金(2006C105)
西北农林科技大学植物育种专项(05YZ019)资助
关键词
施肥
紫花苜蓿品种
土壤肥力
干草产量
fertilization
alfalfa variety
soil fertility
dry forage yield
作者简介
作者简介：韩清芳（1969-），女，陕西周至人，副教授，主要从事旱区农业资源管理与牧草资源开发研究。Tel：029-87080168，E-mail：hanqf88@126.com。
通讯作者E-mail：zhikuan@tom_com
