抗虫杂交棉精播栽培技术研究

以抗虫杂交棉鲁棉研 15号为材料 ,于 1999年在山东省 3个生态区对棉花精播栽培技术的研究表明 ,精播栽培不影响棉花的生育进程 ,但能促进个体生育和提早封行 ,在保证产量不减或略有增加的前提下 ,可相应减少用工量 ,节省成本 ,是抗虫杂交棉有效的配套栽培技术。精播栽培技术的核心内容是精量播种( 6 6 6 7m2 用种量 1kg以下 )、降低密度 ( 6 6 6 7m2 15 0 0～ 2 5 0 0株 )、保留 2个近果枝的营养枝

Studies on less seeding - rate cultivation technique for transgenic hybrid cotton

Field experiments were conducted to study the less seeding-rate cultivation technique adopting hybrid cotton-Lumianyan 15 in three types of ecological cotton growing areas of Shandong Province in 1999The results showed that,compact cultivation with less quantity of seed did not affect cotton plant developmental period,but enhanced individual plant growth and development,and resulted in earlier closure between two rowsThe compact cultivation technique was an effective way for hybrid cotton planting,which could reduce labor force and greatly save cost,while yield kept stableThe main points of this technique were to lessen the seeding rate(less than 1kg),reduce the plant density(22500～37500 plants per hactare),and keep two vegetative branches near the lst fruit branch