重庆地区水稻高产栽培的适宜田间配置方式研究

Study on Suitable Field Collocation Patterns of Rice High Yield Cultivation in Chongqing Area

为明确重庆地区水稻高产栽培的适宜田间配置方式，以瀹香203和Ⅱ优838为材料研究了田阃配置方式对水稻茎集消长、干物质生产、分配、产量及产量构成的影响。结果表明，扩行稀植的方法不仅有利于茎蘖的发生和有效茎蘖数的提高。还有利于增加水稻单株干物质积累量。对于高产水稻群体，齐穗期的地上部干质量为成熟期穗干质量的1．5倍左右，齐穗期主茎5片叶表现为“2〉3≥1≥4〉5”的叶长排序。推荐的田间配置方式为26．6cm×33．3cm或23．3cm×33．3cm。种植密度为7500—8570穴／666．7m2，每穴栽插2苗。

In order to select the suitable field collocation patterns of rice high yield cultivation in Chongqing area, Yu-xiang 203 and II -you 838 were used as tested materials, and the effects d field collocation patterns on the emergence and death dynamics of populalional stemsand tillers, the dry matter production and distribution, grain yield and yield components of rice were studied. The results showed that the spaced planting was not only beneficial to the gemination of stems and linen and the increase of effective stem tillers number, but also to the in- crease of dry matter production of rice per plant. For rice population with high grain yield, the aboveground dry weight at fidl heading stage was 1.5 times as that at maturity stage, the five leaves length sequence of rice in full heading stage was ＇ 2 〉 3 〉-- 1≥4 〉 5 ＇. The recommen- ded field collocation patterns were 26.6 cm× 33.3 cm or 23.3 cm× 33.3 cm, planting density was 7500-8570 holes/666.7 m2, 2 seedlings per hole.