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<正> 黄瓜杂交制种往往采用早春种植。我们通过近几年的研究和改进,进行麦茬种植,种子亩产量可达65公斤左右,经济效益提高3~5倍。主要方法如下: 1 科学育苗 1.1 苗床建设。苗床选在背风向阳处,采用阳畦或平畦,定植1亩需畦面25~30平方米。一般畦宽1.5~2.0米,阳畦后墙高0.6~0.7米。床土配比为4份腐熟的厩肥和6份田土,再加入三元复合肥2公斤、多菌灵粉0.5公斤,混匀后铺在苗床上踏实,厚度为8~10厘米。 1.2 浸种催芽。父本比母本提前种植10~15天。用55℃ 相似文献
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黄瓜是主要的蔬菜品种之一,种植面积较大,是农民菜篮子中不可或缺的菜品。目前育成的品种大部分是杂交种,本文论述了大棚黄瓜杂交制种中提高杂交制种纯度、发芽率及产量的栽培管理技术及制种技术。 相似文献
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酒泉地区有着发展瓜菜制种的优势。本文从黄瓜特征特性及对环境条件的要求、播种、定植、整枝及田间管理,尤其是授粉等一系列环节,系统地总结了改善黄瓜杂交制种优质高产的具体操作技术,可供黄瓜制种参考。 相似文献
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从苗床选择、营养土配制、精量播种方面介绍了黄瓜精量播种技术,并从定植、杂交操作和采种方面介绍了黄瓜杂交制种技术。 相似文献
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Research on Theories and Techniques of Irrigation for Safeguarding Seed Production of Two-Line Hybrid Rice 总被引:2,自引:0,他引:2
ZOU Jiang-shi LUE Chuan-gen YAO Ke-min HU Ning XIA Shi-jian 《中国农业科学(英文版)》2006,5(8):596-602
By inducing frequency, intensity and duration of lower temperature in the middle and last ten-day periods in August in the rice-growing areas of southern China, increasing temperature for safe seed production was defined as 2℃. During the sensitive period of fertility, characters of panicle height and canopy structure of TGMS rice, Pei'ai64S, were measured. Results showed that temperature changes caused by irrigation in fields were below 40 cm of rice plant, and heating effect was significant at 20 cm when the temperature was increased by 3.1 ℃. For the present study, the following irrigation techniques were put forth: the water depth of 15-20 cm, current water used, irrigating after 17:00 and bailing at 10:00 in sunny or cloudy weather, irrigating on whole day, in shady or rainy weather, increasing inflows and outflows in large fields. In the present experiment, pollen fertility and self-fertilized seed setting rate accepted that the techniques were feasible and effective for against lower temperature and safeguarding seed production of two-line hybrid rice. 相似文献