摘要
采用多元二次旋转回归正交组合设计,研究3个施期的氮肥用量(即基、蘖肥用氮量,穗肥用氮量,粒肥用氮量)、调节肥施用时间(叶龄计)及穴距等5个因素对粳稻垦鉴稻10号物质生产与积累的影响。结果表明,基、蘖肥施氮量与干物质积累量呈极显著的二次曲线关系、与中期干物质积累呈极显著正相关(R=0.504 5**)、与抽穗前15d至抽穗后25d的生物量呈极显著正相关(R=0.608 9**);穗肥施氮量与经济系数呈显著正相关(R=0.331 1*);穴距与前期生物量呈极显著负相关(R=-0.631 0**)、与后期生物量呈极显著的二次曲线关系(R=0.493 9**)。说明,通过提高基、蘖肥施氮量可显著提高群体的中期干物质积累、抽穗前15d至抽穗后25d干物质积累;适当减小穴距可提高前期物质生产量和后期物质积累量,而适当提高穗肥施氮量可提高群体的经济系数。因此,对试验因子中的基、蘖肥用氮量与穴距的控制可以实现对各期干物质积累的调控。
The effects of N fertilizer application and density on dry matter accumulation of rice in cold area was studied. N fertilizer dosage at different stages including the amount of nitrogen at early stage, the amount of nitrogen at Mid stage and the amount of nitrogen at later stage, the application time of the regulating fertilizer and hill spacing on material production accumulation of rice in cold area was studied in detail by using multiple factors quadratic rotational regressive orthogonal combination design. The conventional japonica rice variety Kenjiandao 10 was used in this experiment. The results showed that it was a very significant conical relationship between N fertilizer application at early stage and amount of dry matter accumulation, while the relationship of N fertilizer application at early stage and material production in Mid stage was a significantly positive correlation（R=0.504 5＊＊），and that of N fertilizer application at early stage and biomass production from 15 day sbefore heading to 25 days after heading was also significantly positive correlation（R=0.608 9＊＊）；the relationship of amount of panicle fertilizer and economic coefficient was a significantly positive correlation （R=0.331 1＊）but that of hill spacing and biomass at early stage was a very significantly negative correlation （R=-0.631 0 ＊＊） and relationship of hill spacing and biomass at later stage was a very significantly conical relationship （R=0.493 9＊＊）. Properly increasing N fertilizer application at early stage can greatly improve the dry matter accumulation in Mid stage and dry matter from 15 days before heading to 25 days after heading; and properly decreasing hill spacing can improve amount of material production at early stage and amount of material accumulation at later stage but properly increasing panicle fertilizer application can improve economic coefficient of population. Thus, controlling N fertilizer application at early stage and hill spacing of testing f
出处
《西北农业学报》
CAS
CSCD
北大核心
2013年第9期55-64,共10页
Acta Agriculturae Boreali-occidentalis Sinica
基金
黑龙江省科技厅项目(GA10B102)
黑龙江省农垦总局科技局项目(HNK11A-02-02)
黑龙江省农垦总局科技局项目(HNK11A-01-01-02)
北大荒股份有限公司企业联合项目(高端米研发及产业化研究)
关键词
水稻
氮肥
密度
干物质积累
Rice
N fertilizer
Density
Dry matter accumulation
