摘要
以生态育种、理想株型、杂种优势为出发点，探讨培育偏高秆、偏大穗粳爪交组合的可行性。笔者认为，必须突破现有矮秆株型概念。进一步提高单位面积的产量，从挖掘提高生物产量与净同化率的潜力入手，从而提出适当增加秆高、降低单位面积穗数〔２７０～３４５（万／ｈｍ２）〕，培育植株偏高（１１５～１２０ｃｍ），穗偏大（３～４ｇ／穗），抗倒伏，适于不同生产水平和各种不良生态环境，具有明显的根系、分蘖、穗粒优势及后期光合优势的新组合。栽培上采用大垅双行稀植，早促早控，提高中、后期群体质量的配套技术，以实现大面积单产９．７５～１１．２５ｔ／ｈｍ２的产量指标。
On the basis of ecological breeding, ideal plant type and heterosis, the feasibility was discussed on the development of japonica-javenica hybrid rice with partial tall plant and large panicle. The criteria for elite japonica-javanica hybrids are considered to be: appropriately increased plant height (115～120 cm) and decreased number of panicles (2.70～3.45 million panicles/hm 2), heavy panicle weight (3～4 g grains/panicle), strong lodging resistance, wide adaptability (suitable for various cultural conditions and unfavourable ecological conditions) and obvious heterosis in root system, tillering ability, photosynthesis in late stage. In cultivation, the techniques of sparse planting with wide double rows, early promoting and early controlling, inproving population quality in the middle and late stages should be adopted to approach a grain yield of 9.75～11.25 t/hm 2 in commercial production.
出处
《杂交水稻》
CSCD
北大核心
1996年第6期5-7,共3页
Hybrid Rice
关键词
杂交水稻
偏高秆偏大穗
粳爪交
育种
高产
栽培
joponica-javanica hybrid rice
partial tall plant
partial large panicle
breeding
high-yielding physiology, cultural system
