摘要
浙东平原水稻土油菜田间试验施用不同氮、硫水平的结果显示 :(1)油菜籽产量随氮肥用量的增大而增加 ,施N(5 0～ 2 0 0kg/hm2 )不施硫肥条件下 ,增产幅度为 2 .0 %～ 11.8% ,施N和施S(30kg/hm2 )条件下 ,增产幅度为 2 .4 %～ 12 .7%。 (2 )不同施氮水平下 ,施硫增产油菜籽 5 .4 %～ 6 .9%。 (3)油菜氮吸收量随施氮量的增加而呈增加趋势 ,低氮水平下施用硫肥促进油菜氮吸收量加大。 (4)不同施氮水平的产投比为 1.5～ 4 .3,施用硫肥的产投比达 5 .2～ 6 .7。
The effect of different N and S levels on rapeseed yield was investigated by field experiments in the paddy soils derived from alluvial. The results shown that: (1) the grain yield of rapeseed increased with the increase of N application amount, the yield increased by 2.0%～11.8% under application N 50～200kg/hm 2 and no S, while yield increased by 2.4%～12.7% under application N and S 30kg/hm 2. (2) Under the condition of different N levels, the grain yield of application S fertilizer outyielded the control (no-application S fertilizer) by 5.4%～6.9%. (3) N uptake of rapeseed was increased with the increase of N application amount, and S application greatly helped N uptake by rapeseed under the condition of low N level. (4) The ratio of output/input from different N levels were 1.5～4.3 and the ratio of output/input from application S fertilizer were 5.2～6.7. The combination application of N and S could increase the ratio of output/input for N fertilizer application.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2001年第4期62-64,共3页
Chinese Journal of Oil Crop Sciences
基金
国际硫研究所资助项目NKBRSF(G19990 1180 9)
关键词
水稻土
油菜
氮肥
硫肥
产量
经济效益
Paddy soil
Rapeseed
Nitrogen fertilizer
Sulphur fertilizer
Yield
Economic benefic
