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利用玉米杂种优势,在国内外玉米生产实践中都起到了显著的增产作用。回顾我地并结合内地省区玉米单交制种工作中的实际情况,对存在的具体问题,进行具体分析,有助于为今后玉米种子生产进一步发展提供切实可行的相应对策。从制种实践,可以看出以下几个问题: 一、地膜覆盖与土地、墒情条件 由于地膜覆盖在制种中的应用,提早了制种田的播期,使一些过去因错期长而无法制种的组合能够就地制种。但在干旱(或底墒不足)情况下,覆膜前应浇足底水,否则苗出来后会因缺水影响生育,效果不好,尤其是盐碱地(或其它条件较差)更应注意。 二、对株型较高玉米单交种的化控技术应用
The use of maize heterosis in both domestic and foreign corn production practices have played a significant role in increasing production. Reviewing the situation in our country and combining with the actual situation of single-seed corn breeding in the interior provinces and autonomous regions, the specific analysis of the specific problems will help to provide feasible measures for the further development of corn seed production in the future. From the practice of seed production, we can see the following questions: First, the conditions of plastic film mulch and land, soil moisture conditions As the application of mulching in seed production, the sowing date of the system of farming, so that some of the past due to the wrong period of long and can not be made Seed combinations can be grown in situ. However, in the case of drought (or lack of moisture at the end), the foot water should be poured before the film is applied. Otherwise, the seedlings will be affected by lack of water when they come out. The effect is not good, especially for saline-alkali soil (or other conditions are poor). Second, higher plant type corn single cross-species control technology applications