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杂交早稻一般生育期较长,在开发双杂吨粮田生产中,早杂一方面要求早播采用地膜保温育秧,另一方面还要稀播壮苗,需用大量地膜。由于地膜供应有限,成本很高,普遍推广这项技术目前育一定困难。为解决这个矛盾,1987年我所进行了中苗带土育秧试检,不仅可以成倍降低保温育秧成本,而且可以提早移栽,表现禾苗返青快,分蘖早,每亩苗数、穗数多,有利杂交早稻增产。但也存在一些问题,现将初步结果简介如下:
Early hybrid rice generally grows longer, in the development of two-trough grain production, the early hybrids on the one hand requires the early use of plastic film insulation seedlings, on the other hand also sparse seedlings, the need to use a large number of plastic film. Due to the limited supply of film and the high cost, it is difficult to promote this technology at present. In order to solve this contradiction, in 1987 I conducted a medium seedling with soil-based seedling test, not only can double the cost of insulation seedling, and can be transplanted earlier, the performance of seedling green fast, early tillering, the number of seedlings per acre, spike , Favorable hybrid early rice yield. But there are some problems, the preliminary results are summarized as follows: