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广西杂交水稻制种从1976年起至今已将近30年的历史,本文通过对广西杂交水稻制种技术的总结,提出杂交水稻高产制种主要技术。 相似文献
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介绍了杂交水稻高产制种技术,包括科学调整花期、创建协调的高产苗穗结构、科学使用九二O、改进授粉技术、加强病虫害防治等内容.以期为西畴县杂交水稻的高产制种提供参考。 相似文献
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“寒优湘晴”是由闵行区农科所利用BT型晚粳不育系“寒丰A”与“R湘晴”配组,于1984年育成的中熟杂交晚粳组合。因其产量高、品质优一直是崇明地区水稻主栽品种。通过多年实践,基本摸清了“寒优湘晴”父母本的特征特性,以及该组合高产优质制种技术措施,为进一步扩大制种规模、降低制种成本提供理论和实践依据。 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
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花期预测是保证水稻(Oryza sativa L.)杂交繁制过程中花期相遇的重要措施,也是花期调节的依据。因亲本类型、亲本特性、气候环境、栽培条件等的不同,花期预测可以采取多种方法,各种方法有难有易,但在实际生产中具体选用何种方法还需要依据个人熟练程度和具体情况进行判断。在所有的花期预测方法中,以幼穗剥查预测法最为准确可靠。 相似文献
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海南省杂交水稻制种产业具有重要的战略意义,且具有气候和地理等优势,但也存在诸多不足和f-q题,潜在风险较大,制约了产业的发展。分析认为,海南省杂交水稻制种产业虽然受国家和地方种业政策的影响,但通过改善产业发展环境和改进生产经营模式等方法,产业还有很大的发展潜力和空间。 相似文献