摘要
采用田间小区试验,研究了种植密度和施肥水平对湘杂油763氮磷钾养分吸收和籽粒产量的影响。结果表明:在相同种植密度条件下,高施肥处理的产量明显高于低施肥处理,且4个施肥水平间产量的差异达到显著或极显著水平;高施肥而种植密度小和低施肥而种植密度大的处理产量相对较高。所设的24个处理中,产量最高为2 696.15 kg/hm2(施N肥180 kg/hm2、施P肥90 kg/hm2、施K肥158 kg/hm2、种植密度为7.5×104株/hm2)。施肥量高的处理氮磷钾积累量相对较高,其变化趋势和产量的变化趋势基本一致,而且氮磷钾积累量与产量的相关性达到极显著水平;在盛花期和收获期氮素和磷素含量呈先增后减的趋势,且差异不明显,但远大于越冬期,而钾素含量的变化却很小。
Field experiments were conducted to investigate effects of different planting densities and fertilizer application levels on N, P, K （nitrogen, phosphorus, potassium） uptake and seed yield of rapeseed variety Xiangzayou 763.The results showed that, yield of high fertilizer application treatment were significantly higher than that in the low fertilizer application treatment under the same planting density, and there were significant or highly significant differences in seed yield among the 4 fertilizer application treatments. Seed yield in 2 treatments （higher fertilizer application level with lower planting density treatment, lower fertilizer application level with higher planting density treatment） were relatively higher. The highest yield （N was 180 kg/hm^2, P was 90kg/hm^2, K was 158 kg/hm^2 and the planting density was 75 000 plants/hm^2） was 2 696.15 kg/hm^2 among the 24 treatments. Higher fertilizer application treatments had higher NPK accumulation, which was consistent to the seed yield, and there was highly significant correlation between yield and NPK accumulation. The contents of N and P during flowering and harvesting stages, which were much higher than those during the wintering stage, increased first and then decreased, but the change was not obvious. The K content showed less change.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期586-591,共6页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家油菜产业技术体系建设项目(nyctx-00509)
国家"863"计划项目(2006BAD21B03)
湖南省重大专项(2009FJ1006-1
2009FJ1006-3)
湖南省高校创新平台开放基金项目(09K049)
关键词
油菜
种植密度
施肥水平
养分吸收
产量
rapeseed
planting density
fertilizer application level
nutrients absorption
yield
