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早籼“233”是福建农学院遗传育种教研组用珍龙410与石轮棒杂交、回交,于1978年育成的。1981年全省推广30万亩,亩产可达1200斤,一般700～900斤。1981年早季采用不同时期剪叶处理,探讨不同叶层与产量构成因素的关系。观察分蘖特性、幼穗发育。乳熟期采用去叶、去穗处理探讨主茎与分薛养分的运转关系。并进行大面积生产调查。所有材料分别进行方差分析、新极差测验。主要结果如下:1.“233”全生育期110～125天,12—13叶,有效积温1450±21.8℃。稻米粗旦白质含量11.049％,16种氨基酸含量90.93/毫克。2.剪除4—7/0叶影响分蘖数。剪除8～12/0叶影响分蘖成穗率。剪除10-12/0叶削减茎秆单位长度干重、穗粒数和粒重。3.“233”多数分蘖着生于4/0、5/0、6/0三节位。主穗与分蘖穗的养分供应有相对独立性。但分蘖叶提供主穗的同化物多于主茎叶供应分蘖穗。
Early indica “233” is Fujian Agricultural College of Genetics and Breeding Teaching and Research Group with 410 and stone pearl bar hybridization, backcrossed, bred in 1978. In 1981 the province to promote 30 million mu, up to 1200 kg per mu, usually 700 to 900 pounds. In early 1981, leaf cutting was carried out at different stages to discuss the relationship between different leaf layers and yield components. Observation of tillering characteristics, young panicle development. Milking used to remove leaves, spike treatment to discuss the relationship between the main stem and sub-nutrients. And large-scale production survey. All materials were analyzed by ANOVA and new difference test. The main results are as follows: 1. “233” The whole growth period of 110 to 125 days, 12-13 leaves, the effective accumulated temperature 1450 ± 21.8 ℃. Rice crude protein content of 11.049%, 16 amino acids 90.93 / mg. 2. Cut 4-7 / 0 leaves affect the number of tillers. Cutting 8 ~ 12/0 leaves affect tillering rate. Cut off 10-12 / 0 leaves to reduce stem length per unit length, grain number and grain weight. 3. “233” Most of the tillers were born in 4 / 0,5 / 0,6 / 0 three knots. The main spike and tiller spike nutrient supply are relatively independent. However, the tillering leaves provided more main tassels than the main stems with tillering spikes.