摘要
为了给黄土高原紫花苜蓿测土施肥提供科学依据,采用零散实验数据整合法、土壤养分含量与缺素处理相对产量回归方程法和"养分平衡-地力差减法"确定适宜施肥量新应用公式,开展了黄土高原苜蓿适宜施磷量与土壤有效磷丰缺指标研究。结果表明,黄土高原苜蓿土壤有效磷(Olsen-P)第1~8级丰缺指标依次为≥41、23~41、13~23、7.0~13、4.0~7.0、2.2~4.0、1.3~2.2和<1.3mg/kg;当目标产量12~22.5t/hm^2、磷肥当季利用率20%时,有效磷丰缺级别第1~8级土壤的苜蓿适宜施磷量范围依次为0、27~68、54~135、81~203、108~270、135~338、162~405和189~473kg/hm^2。
Methods such as data integration, regression equation and so on, were applied to provide scientific basis for alfalfa planting soil testing and fertilization recommendation in Loess Plateau area in China. Appropriate P fertilization and abundance-deficiency index(ADI) of soil available P(Olsen-P) were measured in the present study. The results showed that ADI(grade 1~8) of soil Olsen-P for alfalfa in the Loess Plateau was as following: ≥41, 23~41, 13~23, 7.0~13, 4.0~7.0, 2.2~4.0, 1.3~2.2 and<1.3 mg/kg, respectively. As alfalfa target yield 12~22.5 t/hm^2 and seasonal P utilization 20%, appropriate fertilizer application rates(abundance-deficiency index 1~8) were 0, 27~68, 54~135, 81~203, 108~270, 135~338, 162~405 and 189~473 kg/hm^2, respectively.
作者
孙洪仁
卜耀军
杨彩林
乔楠
闫朝
倪兴成
郝小军
SUN Hong-ren;BU Yao-jun;YANG Cai-lin;QIAO Nan;YAN Zhao;NI Xing-cheng;HAO Xiao-jun(College of Grassland Science and Technology,China Agricultural University,Beijing 100193,China;College of Life Sciences,Yulin University,Yulin 719000,China;Grassland Workstation of Shenmu City,Shenmu,719300,China)
出处
《中国草地学报》
CSCD
北大核心
2020年第2期41-46,共6页
Chinese Journal of Grassland
基金
农业部公益性行业项目“苜蓿高效种植技术研究与示范”(201403048)
国家现代农业产业技术体系建设项目“现代牧草产业技术体系建设”(CARS-35)。
关键词
测土施肥
紫花苜蓿
土壤养分
有效磷
丰缺指标
施肥指标
施肥量
Soil testing and fertilization recommendation
Alfalfa
Soil nutrient
Available P
Abundance-deficiency index
Fertilization index
Fertilizer application rate
