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以杂交中稻组合川香优9838为材料,通过氮肥施用量、施氮方式与栽秧方式处理,研究了地上部干物质积累与源库性状。结果表明,川香优9838的高产栽培技术为:施纯氮90kg/hm2,采用“底∶蘖=7∶3”的重底早追施肥法;栽秧密度上等肥力田14～15万丛/hm2,中等肥力田18～19万丛/hm2,在栽秧方式上仍以传统的等行距栽培为好。稻谷产量达10500kg/hm2水平的地上部主要性状表现为:最高苗数360万/hm2,成穗率56%;齐穗期叶面积指数7.6,齐穗期地上部干物质积累量13000kg/hm2,齐穗期叶绿素含量(SPAD值)41;有效穗205万/hm2,穗粒数180粒,千粒重32g,结实率84%,氮素稻谷生产效率50kggrain/kgN。
The hybrid mid-rice combination Chuanxiangyou 9838 was used to study the accumulation of dry matter and the characteristics of source-sinks in above-ground parts by means of nitrogen application, nitrogen application and planting methods. The results showed that the high-yielding cultivation techniques of Chuanxiangyou 9838 were as follows: applying pure nitrogen 90kg / hm2, using “bottom: tiller = 7: 3” Wan Cong / hm2, medium fertility field 18 ~ 190 000 plexus / hm2, in the way of planting is still the traditional line spacing cultivation is better. The main characteristics of above-ground parts of paddy with rice yield of 10500kg / hm2 were as follows: the highest seedling number was 3.6 million / hm2, the percentage of spikelets was 56%; the leaf area index at heading stage was 7.6, the dry matter accumulation of shoot at heading stage was 13000kg / hm2, The spikelet chlorophyll content (SPAD value) 41; effective ear 2.05 million / hm2, grain number 180, grain weight 32g, seed setting rate 84%, nitrogen rice production efficiency 50kggrain / kgN.