摘要
以寒地水稻品种东农428为试验材料,在秸秆还田条件下研究不同氮肥施用量对水稻植株氮磷钾吸收及产量的影响。结果表明:在秸秆还田条件下分蘖期、抽穗期、灌浆期和成熟期的植株干物质积累均表现出随着施氮量的增加而明显增加的趋势;而产量和有效穗数呈先升高后降低的变化趋势,氮肥用量为133 kg·hm-2时最高,产量最高可达7983.33 kg·hm-2,有效穗数每株17.7个;分蘖期各处理植株氮磷钾积累差异不明显,抽穗期呈现先升高后降低的变化趋势,而灌浆期和成熟期表现出一直增加的趋势。秸秆还田增加了有效穗数,对水稻产量、穂重、总空瘪率和千粒重没有影响;对分蘖期和抽穗期的氮磷钾积累均没有影响,而在灌浆期秸秆还田抑制了氮磷钾积累;成熟期秸秆还田抑制氮积累,促进了磷钾积累。
Effects of nitrogen amou nt on yield and nutrient absorption of cold land japonica rice under the condition of straw returning were studied using cold land rice variety Dong Nong 428 as experimental material. The results showed that： with the improvement of nitrogen amount, the plant dry matter accumulation of tillering stage, heading stage, grain filling stage and maturity stage all took on obvious increasing trend. The yield and effective spikes increased first then reduced, the highest yield and effective panicles per plant was 7983.33 kg·hm-2 and 17.7 per plant, in treatment with nitrogen amount of 133 kg·hm2, Differences of plant N, P and K accumulation of each treatment in tillering stage were not obvious and showed single peak curve change in heading stage and obvious increasing trend in grain filling stage and maturity stage. The straw returning increased effective spikes, but had no effects on yield, spike weight, total shriveled rate and 1000-grain weight. The straw returning also had no effects on N, P and K accumulation in tillering and heading stage, and could inhibit N, P and K accumulation in grain filling stage.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2014年第1期78-82,共5页
Journal of Shenyang Agricultural University
基金
国家科技支撑计划项目(2012BAD14B06-03)
黑龙江省农业科技创新工程项目(2012ZD029)
哈尔滨市青年科技创新人才项目(2013RFQYJ045)
关键词
秸秆还田
粳稻
产量
氮磷钾积累量
straw returning
Japonica rice
yield
NPK accumulation
