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1986年,我县推广水稻合理稀植技术面积达22.95万亩,占全县水稻面积的32.8％,普遍收到降低成本,增产增收的效果。水稻合理稀植后,改善了田间水、肥、气、热、光照等环境条件,协调了群体与个体之间的关系,改变了水稻生长态势,提高了光合利用率。水稻有效分蘖期延长,提高了成穗率。据试验,稀植田水稻分蘖始期与密植田无明显变化,但终止期延长5—10天,单株有效分蘖提高66.7％,低节位蘖、高节位蘖,二次分蘖的成穗和穗粒数均高于密植田。稀植田由于穴距加大,密度降低,插壮秧,个体发育健壮,表现抗倒伏,病害轻。全县20多万亩稀植田都没有发生倒伏,块块表现穗大、粒多,增产。据全县11个乡30个田块15组对比田块调查,稀植田平均亩产517.7公斤,比密植田平均每亩增产56.5公斤,增产10.9％。
In 1986, our county popularized the rational planting of rice with an area of 22.95 hectares, accounting for 32.8% of the rice area of the whole county, and generally received the effect of reducing costs, increasing production and increasing income. After the rice is reasonably thinned, the environmental conditions such as water, fertilizer, gas, heat and light in the field are improved, the relationship between the population and the individual is coordinated, the growth of rice is changed, and the photosynthetic utilization rate is increased. The effective tillering stage of rice is prolonged and the rate of ear formation is increased. According to the experiment, there was no significant difference between the early tillering stage and the close planting field of sparsely-grown rice, but the termination period was prolonged by 5-10 days. The effective tillering per plant was increased by 66.7%. The tillers with low tillers, high tillers with tillers, The grain number is higher than the densely populated field. Sparsely populated fields due to increased pitch, density, inserted strong seedlings, the development of robust individuals, the performance of lodging resistance, disease light. The county more than 200000 acres of sparsely populated fields have not occurred lodging, block performance spike, grain and more, increase production. According to the field survey of 15 plots of 30 plots in 11 townships in the county, the average yield per square meter of sparsely populated fields was 517.7 kg, an increase of 56.5 kg and 10.9% respectively over the average density of paddy fields.