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以杂交籼稻汕优 6 3和粳稻镇稻 88为材料 ,研究了旱种 (地膜覆盖栽培 )水稻的生长发育与产量形成的特性。与水种 (常规栽培 ,对照 )相比 ,旱种水稻在有效分蘖临界叶龄期前分蘖发生慢、叶面积指数小 ,干物质积累少 ,在拔节期则相反。旱种水稻的各节间长度、分蘖成穗率、粒叶比 [颖花数 /叶 (cm2 ) ]、灌浆中后期的叶片光合速率、成熟期干物质积累以及活跃灌浆期均小于对照 ,但抽穗期的根干重、根冠比、灌浆前期的根系活力、平均灌浆速率、物质运转率和收获指数 ,则高于对照。旱种水稻的每穗粒数少于对照 ,单位面积的穗数则多于对照 ,结实率与对照无显著差异。旱种水稻的粒重和产量 ,汕优 6 3与对照无显著差异 ,镇稻 88则显著低于对照。对旱种水稻的增产途径进行了讨论
The hybrid rice Shanyou 63 and japonica rice Zhendao 88 were used to study the characteristics of growth and yield formation of dryland (plastic film mulching) paddy. Compared with the water (conventional cultivation and control), the dry cultivated rice had slower tillering, lower leaf area index, less dry matter accumulation at the tillering stage of effective tillering, and opposite at jointing stage. The internode length, tillering rate, grain-leaf ratio [spikelets / leaf (cm2)], leaf photosynthetic rate, maturity dry matter accumulation and active grain filling stage were all less than those in the control Root dry weight at heading, root / shoot ratio, root activity at early grain filling, average filling rate, material turnover rate and harvest index were higher than those of the control. The number of spikelets in dry-cultivated rice was less than that in the control, and the number of panicles per unit area was more than that in the control. The seed setting rate was not significantly different from the control. The grain weight and yield of dry-cultivated rice, Shanyou 6 3 and the control no significant difference, Zhen-88 was significantly lower than the control. The ways of increasing yield of dry-cultivated rice are discussed