黄土高原沟壑区苜蓿生产力及养分特性的研究
文献类型:期刊论文
作者 | 折凤霞 ; 郝明德 ; 臧逸飞 |
刊名 | 草 业 学 报
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出版日期 | 2013 |
卷号 | 22期号:02页码:313-05 |
关键词 | 紫花苜蓿 :alfalfa 产草量 forage yield 养分吸收 nutrient absorption 土壤肥力 soil fertility |
其他题名 | Alfalfa productivity and plateau characteristics in a gully region of the Loess Plateau |
中文摘要 | 在长期定位试验的基础上,研究了黄土高原沟壑区粮草轮作中苜蓿产草量及其养分变化特性。结果表明,苜蓿产草量一年生最低,为8 763kg/hm2,3年生产草量达到最高,为12 020kg/hm2,4年生产草量为9 665kg/hm2,开始出现下降。1年生苜蓿对氮、磷、钾的吸收量最低,分别为218kg/hm2,11kg/hm2,105kg/hm2,3年生苜蓿对磷、钾的吸收量最高,分别为23kg/hm2和185kg/hm2,比1年生苜蓿吸磷量高109.1%、吸钾量高76.2%;而4年生苜蓿对氮的吸收量最高,为351kg/hm2,比1年生苜蓿吸氮高61%。土壤有机质、全氮和碱解氮含量逐年增加,有机质由15.60g/kg增至18.26g/kg,全氮由1.20g/kg增至1.50g/kg,碱解氮由64.74mg/kg增至88.02mg/kg;土壤全磷、速效磷及速效钾含量逐年下降,全磷由0.86g/kg降至0.76g/kg,速效磷由14.00mg/kg降至9.27mg/kg,速效钾由70.51mg/kg降至54.35mg/kg。建议在生产中施适量钾肥满足苜蓿高品质、高产量的需要。 |
英文摘要 | Abstract:Alfalfa(Medicago sativa)plant yield and nutrient change characteristics of forage crop rotation were studied in a long-term experiment in the gully region of the Loess Plateau.The one-year Medicago yield was 8 763kg/ha(the lowest)and the three-year Medicago yield was 12 020kg/ha(the highest)but the four-year yield fell to 9 665kg/ha.The N,P,K uptake(218,11,105kg/ha respectively)in one-year Medicago was the lowest.The P,K uptake of three-year Medicago was the highest(23kg/ha and 185kg/ha respectively)and compared with one-year Medicago,the P uptake was 109.1%higher and the K uptake was 76.2%higher.The N uptake of four-year Medicago was the highest,about 351kg/ha,which was 61%higher than one-year Medicago. Soil organic matter,total nitrogen and alkali solution nitrogen content increased each year,organic matter increased form 15.60to 18.26g/kg,total nitrogen increased from 1.20to 1.50g/kg,and alkali solution nitrogen increased from 64.74to 88.02mg/kg.However,soil total phosphorus,available phosphorus and potassium declined each year.Total phosphorus fell from 0.86to 0.76g/kg,available phosphorus fell from 14.00to 9.27mg/kg,rapidly-available potassium fell from 70.51to 54.35mg/kg.Consequently,the optimum amount of potash in production fertilizer is needed to meet the needs of high quality and high production of afalfa |
语种 | 中文 |
公开日期 | 2014-10-20 |
源URL | [http://ir.iswc.ac.cn/handle/361005/5564] ![]() |
专题 | 水土保持研究所_水保所知识产出(1956-2013) |
推荐引用方式 GB/T 7714 | 折凤霞,郝明德,臧逸飞. 黄土高原沟壑区苜蓿生产力及养分特性的研究[J]. 草 业 学 报,2013,22(02):313-05. |
APA | 折凤霞,郝明德,&臧逸飞.(2013).黄土高原沟壑区苜蓿生产力及养分特性的研究.草 业 学 报,22(02),313-05. |
MLA | 折凤霞,et al."黄土高原沟壑区苜蓿生产力及养分特性的研究".草 业 学 报 22.02(2013):313-05. |
入库方式: OAI收割
来源:水土保持研究所
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