摘要
在小麦—玉米一年两熟耕作制度下,通过河北雄县壤质土13年长期定位不同施肥养分耗竭试验,探讨土壤自身养分生产力的表达方式。结果表明,土壤N、P、K、Zn、Mn、B元素对于小麦的支撑产量分别为2 553、3 918、5 668、6 571、6 871和7 353 kg hm-2,对玉米的支撑产量分别为2 280、4 576、6 875、8 788、9 465和9 188 kg hm-2。六种养分的土壤自身循环平衡能力在小麦上依次为N<P<K<Zn<Mn<B,在玉米上为N<P<K<Zn<B<Mn。作物产量的可持续指数显示,养分不均衡施用处理均低于全肥处理,尤其以N0和P0处理的产量可持续性最差。
To explore expression of nutrients productivity of the soil per se, ment on soil nutrient depletion was carried out in fluvo-aquic soil under a winter （Zea mays L. ） double cropping system in Xiongxian County of Hebei Province a 13-year stationary fertilization experiwheat （Triticum aestivum L. ） - maize The experiment was designed to have eight treatments, namely control （no fertilizer applied）, complete fertiliztion, and complete fertilization except N, P, K, Mn, Zn, or B alternately, and ＂sustaining yield＂ was used as the index of soil nutrient productivity. Results show that the sustaining yield of soil N, P, K, Zn, Mn, and B was 2 553, 3 918, 5 668, 6 571 , 6 871, and 7 353 kg hm-2 for wheat, and 2 280, 4 576, 6 875, 8 788, 9 465, and 9 188 kg hm 2 for maize, respectively. The lower sustaining yields of soil N, P, and K showed high possibility of yield promotion through lifting their respective nutrient barrier. Regarding the selfbalancing and recylcing ability, the six soil elements followed an order of N 〈 P 〈 K 〈 Zn 〈 Mn 〈 B in the wheat cropping season, and N 〈 P 〈 K 〈 Zn 〈 B 〈 Mn in the maize cropping season. The sustainable yield indexes （SYI） of the eight treatments show that the complete fertilization treatment was the highest in soil nutrient productivity, whereas the rest were much lower because of imbalance of nutrient supply with Treatments No and P0 in particular. Key words Productivity of soil nutrient; Sustaining yield; Sustainable yield index; Double cropping system
出处
《土壤学报》
CAS
CSCD
北大核心
2010年第3期555-562,共8页
Acta Pedologica Sinica
基金
国家重点基础研究发展规划(973)项目(2005CB121107)
河北省农用地综合产能调查和评价项目(2007-4-2)资助
关键词
土壤养分生产力
支撑产量
产量可持续指数
一年两熟制
Productivity of soil nutrient
Sustaining yield
Sustainable yield index
Double cropping system
