摘要
在田间条件下，研究树脂控释尿素、硫加树脂控释尿素养分释放与水稻养分吸收相关性，以及对水稻产量影响与机理。结果表明：与普通尿素相比，在施肥量相同条件下，树脂包膜尿素与硫加树脂尿素处理土壤养分释放及供应与水稻吸收氮素具有显著正相关性，R2分别为0．8850和0．9253，更能满足水稻对养分的吸收；树脂控释尿素与硫加树脂控释尿素处理生物产量较普通尿素处理增加14．1％～15％，经济产量增产8．51％～18．05％，而树脂控释尿素与硫加树脂控释尿素处理间差异不显著；树脂控释尿素、硫加树脂控释尿素氮肥利用率分别为50．91％和55．41％，比普通尿素追肥处理提高了57．1％和71．2％，均达到显著差异。与普通尿素相比，控释氮肥养分释放更有利于水稻氮素吸收，促进生长，提高产量和氮素利用率。
A field study was conducted to investigate the mechanism of polyester coated urea （PCU） and polyester sulfur coated urea（PSCU） on nitrogen release and rice uptake. The results showed： Compared with PU（PU1 and PU2）, the nitrogen release of PCU and PSCU in soil could meet the demand of nutrition uptake on rice. There was significant positive correlation between the nutrition released rate of PCU and PSCU and the rice uptake nutrition, R2 were 0. 885 0 and 0. 925 3. Compared with PU（PU1 and PU2）, the biomass of above-ground significantly increased by 14. 4% to 15; with a based application of PCU and PSCU, the economic yield of rice significantly increased by 8.51 % to 18.05%. Compared with PU2, the NUE of PCU and PSCU significantly increased by 57. 1% and 71.2%. The PCU and PSCU were better on effective panicle and ANUE than PU treatments. However, there was no significant difference between PCU and PSCU. The control-released fertilizer could significantly increase NUE and rice yield.
出处
《水土保持学报》
CSCD
北大核心
2014年第1期215-220,共6页
Journal of Soil and Water Conservation
基金
国家"十二五"科技支撑计划项目(2011BAD11B01)
国家"948"项目(2011-G30)
关键词
控释氮肥
水稻
氮素释放
氮素吸收
相关性
controlled-release fertilizer
rice
nitrogen release
nutrient uptake
correlation
