黄瓜杂交制种,山东省4月下旬至7月上中旬温度、光照等气候条件适合黄瓜生长发育,且传粉昆虫多,雌花能较充分授粉,种子产量较高,成本低。因此,不论温室、大棚黄瓜、春黄瓜和夏秋黄瓜,只要落实好自然隔离区,均可采用春季露地杂交制种。其主要杂交技术措施如下: 一、特征特性与制种地选择黄瓜虽然是喜温作物,但性喜冷凉气候,果实在较低的温度下发育良好,在高温、多湿的环境下易发生病害。黄瓜又为浅根系作物,喜湿不耐干旱,又怕涝,制种地应选择 Cucumber hybrid seed production, Shandong province in late April to July mid-upper temperature, light and other climatic conditions suitable for cucumber growth and development, and more pollinators, female flowers can be more fully pollination, high seed yield and low cost. Therefore, regardless of greenhouse, greenhouse cucumber, spring cucumber and summer cucumber, as long as the implementation of a natural isolation zone, can be used for spring hybrids in the open field. The main hybridization techniques are as follows: First, the characteristics and the choice of seed production Although cucumber is a warm-weather crops, but the nature of cold climate, the fruit is well developed at lower temperatures, prone to disease in hot, humid environment . Cucumber is a shallow root crops, like moisture intolerance drought, fear of waterlogging, the system should be selected