受淹中稻割穗再生高产特点及主要技术

分析了受淹中稻割穗再生高产的几个特点,据此提出了主攻再生芽萌发、提高成穗率等主要技术。     

杂交中稻再生技术研究和应用

针对川东南低海拔一季中稻区光热土地资源未能充分利用的现状，研究和推广了杂交中稻蓄留再生稻技术，１９８６～１９８９年收获再生稻１４５９．１８万亩，平均亩产９６．８公斤，共计生产稻谷１４．１２亿公斤。在适宜地区利用现有杂交中稻蓄留再生稻是进一步发挥水稻杂种优势，增产稻谷的一条有效途径。     

杂交中稻免耕抛栽高桩再生集成技术研究

针对杂交中稻免耕抛栽高桩再生栽培几项关键技术进行了为期2a的研究。结果表明,该集成技术的关键在于：选用优良的再生稻组合;抛栽后撒施1次30％抛秧一次净进行田间除草;适宜的抛栽密度为21万丛/hm^2;在中稻收割前12d施用尿素150kg／hm^2,收割后再立即施用尿素150kg/hm^2;留桩高度以40cm(留倒2节)为宜。运用该集成技术种植,中稻加再生稻产量可达12～13t/hm^2,与双季稻全年产量水平相当,但再生稻米质更优,且省工省成本,可提高经济效益2876,4元／hm^2。     

杂交中稻不同割苗时期及留桩高度对再生特性及产量的影响

以杂交中稻川香优9838为材料,研究了头季稻不同时期割苗及不同留桩高度对再生稻生长特性及产量构成的影响。结果表明,再生稻的总叶片数随着留桩高度的降低而增加;生育期随着头季稻割苗期的推迟而延长,产量也随之逐渐下降,在遭受特大高温干旱情况下,仍可达到头季稻产量的15.9%~75.2%。     

重穗型杂交中稻组合的特点及其超高产栽培技术

根据 6a的试验、示范结果 ,分析了重穗型杂交中稻组合的特点 ,提出了相应的超高产 (≥ 1 0t/hm2 )栽培技术措施     

穗重型杂交中稻新组合冈优501

穗重型杂交中稻新组合冈优５０１ＧａｎｇＹｏｕ５０１，ａｎｅｗｈｅａｖｙ－ｐａｎｉｃｌｅｍｅｄｉｕｍｉｎｄｉｃａｈｙｂｒｉｄｒｉｃｅｃｏｍｂｉｎａｔｉｏｎ谢崇华陈永军（四川省绵阳经济技术高等专科学校６２１０００）冈优５０１是绵阳经济技术高等专科学校（原...     

重惠型杂交中稻组合的特点及其超高产栽培技术

根据６ａ的试验、示范结果,分析了重穗型杂交中稻组合的特点,提出了相应的超高产（≥１０ｔ／ｈｍ＾２）栽培技术措施。     

杂交稻再生制种亲本割差期研究

本文作者运用多年的实践经验和观察资料,对如何确定和调节杂交稻再生制种的亲本“割差期”进行了较系统的研究,得出了有关经验公式和量化指标,并指出“有效积温差法”比较可靠,“时差法”和“叶差法”也简便可行。     

中稻直播效果及技术

江西省乐平市是国家商品粮基地 ,粮食生产是一大优势。近年来 ,粮食产量增加但销路不畅 ,农民增收缓慢。因此 ,调整农业结构 ,实行稻田耕作改制势在必行。１９９９年我市在部分乡镇开展了改双季稻为一季中稻、改育秧移栽为直播栽培试点 ,面积２００ｈｍ２,一举获得成功。２０００年扩大示范面积至１１３３．３ｈｍ２,平均单产达６７４ｋｇ／６６７ｍ２,比二晚杂交稻增长３８．６%。一、中稻直播的效果与中稻移栽技术相比 ,中稻直播具有省力、省工、省种、省秧田和省成本的优点 ,产量和纯收入也比中稻移栽有了大幅度的提高 (见表１)。表１结…     

受淹杂交中稻蓄留再生稻的关键技术探讨

本研究对2007年7月上中旬四川东部和南部部分地区遭受特大洪涝灾害的杂交中稻的产量损失进行了广泛的生产调查,同时开展了洪灾后蓄留再生稻的割苗时间、留桩高度和发苗肥施用量同田对比试验。结果表明,杂交中稻对洪水淹没最敏感的时期是孕穗末期至齐穗期,可将破口至盛穗期洪水淹没30—40h、孕穗末期和齐穗期淹没48h作为是否割苗蓄留再生稻的重要参考指标。早割苗、低留桩、增施发苗肥是夺取再生稻高产的关键。最佳割苗时间宜安排在洪水退后3～7d,对割下的稻株上部茎叶就地还田是切实可行的。在四川中稻再生稻区,留桩高度20cm,以利用倒4芽和倒5芽为主,有利于提高低节位再生芽的成穗比重,并能保证安全抽穗扬花、灌浆和籽粒充实,实现穗大粒多,最终获得高产。增施发苗肥,有利于提高再生稻有效穗和穗实粒数,从而提高产量,其既高产又经济的枯莆肥用量县每hm^2用尿素225-300kg。     

超级杂交稻深两优5814中稻—再生稻高产栽培技术

介绍了超级杂交稻深两优5814在重庆的种植表现,总结提出了该品种的中稻—再生稻2季高产栽培技术。建议在重庆、江西、湖北、安徽及福建等再生稻主产区推广应用深两优5814,并研究集成以全程机械化生产为核心的中稻—再生稻高产高效栽培技术模式,以发挥该品种及再生稻技术在增加粮食单产和种粮收益中的作用。     

杂交中籼稻Z优272中稻+再生稻高产栽培技术

Z优272既有中稻早播、早栽、早熟、高产的特点,又有中稻低位分蘖早发、多发、成穗的特性,总结了其中稻+再生稻高产栽培技术。     

杂交中稻--再生稻抛秧栽培技术方案的优选研究

采用三元二次回归正交旋转组合设计方法,研究了旱育抛秧的叶龄、抛植密度、施氮水平等因子对杂交水稻冈优22头季稻、再生稻及两季总产的影响, 并建立了相应的数学模型;在电子计算机上优选了不同水平的栽培技术因子方案,解析了各因素及其互作对产量的效应.     

再生稻产量构成因素分析

对再生稻产量构成因素分析结果表明 :头季以每穗粒数变异最大 ,与产量的相关最密切 ,对产量的直接通径系数最高 ,对形成产量的贡献率最大 ;再生季则以每平方米穗数变异最大 ,与产量的相关最密切 ,对产量的直接通径系数最高 ,对形成产量的贡献率最大     

发展水稻机械化插秧的技术措施

随着农村剩余劳动力的加快转移,机械化插秧技术的普及应用成为历史的必然。机械化插秧有偿服务组织应运而生,并不断发展壮大。机械化插秧需把握好适期播种、均匀播种、高标准水系建设、适时适量施用送嫁肥、及时防治病虫害、提高整地质量、适时栽插、合理密植和一栽就管等关键技术环节。做到集中连片种植、实行工厂化育秧、规模化经营、专业化服务。     

杂交中稻蓄留再生稻应用效果及其配套栽培技术

四川省邻水县自1986年以来开展杂交中稻蓄留再生稻试验示范和大面积推广,取得了显著效果,总结了"杂交种,增(保)温秧,配方肥,半旱式,小苗栽,二万窝(穴),促芽肥,高留桩,适抢收,防病虫"配套技术措施。     

The Origin of Flooded Rice Cultivation

Rice cultivation has long been considered to have originated from seeding of annual types of wild rice somewhere in subtropics, tropics or in the Yangtze River basin. That idea, however, contains a fatally weak point, when we consider the tremendous difficulty for primitive human to seed any cereal crop in the warm and humid climate, where weed thrives all year round. Instead of the accepted theory, we have to see a reality that vegetative propagation of edible plants is a dominant form of agriculture in such regions. The possibility is discussed that Job's tears and rice, two cereal crops unique to the region, might have been developed via vegetative propagation to obtain materials for medicine or herb tea in backyard gardens prior to cereal production. This idea is supported by the fact that rice in temperate regions is still perennial in its growth habit and that such backyard gardens with transplanted taro can still be seen from Yunnan Province of China to Laos. Thanks to detailed survey of wild rice throughout China for 1970-1980, it is now confirmed that a set of clones of wild rice exist in shallow swamps in Jiangxi Province, an area with severe winter cold. In early summer ancient farmers may have divided the sprouting buds and spread them by transplanting into flooded shallow marsh. Such way of propagation might have faster improved less productive rice through a better genetic potential for response to human interference than quick fixation in seed propagation, because vegetative parts are heterogeneous. Obviously, such a primitive manner of rice cultivation did include the essential parts of rice farming, i.e., nursery bed, transplanting in flooded field of shallow marsh like. Transfer from the primitive nursery to true nursery by seed may have later allowed rice cultivation to be extended to northern regions. In thus devised flooded cultivation there were a series of unique advantages, i.e.; continuous cropping of rice in a same plot, no soil erosion, slow decline of soil fertility, availability of minerals, and resulting in high yield per unit area, which have collectively attained the highly productive cereal cultivation in the warm and humid region. Rice cultivation in marsh is also favorable to raise fish culture, both of which constituted a nutritionally balanced base. Development of irrigation technology to construct flooded farms gave strong bases for stable rice-cultivating society, which in the end formulated the rise of ancient kingdoms of Yue and Wu in China in BC 6 th -5th centuries. They were direct descendents of those people who had developed the unique rice cultivation from the era of Hemudu culture, which is dated back to 5 000 BC. Their movement to the south is considered to have established rice-cultivating communities in South China and Southeast Asia, while to the north it transferred the rice-based technology to ancient Korea and Japan and had established there a base for a civilized society.     

闽北地区再生稻高产栽培技术

2009-2010年南平市延平区选用Ⅱ优航1号、Ⅱ优明86等组合培植再生稻,有效提高了单季稻田单位面积的稻谷产量和收入,取得较好的经济效益.介绍了闽北地区种植再生稻的主要栽培技术.     

天优673作再生稻高产栽培技术

天优673是由福建省农业科学院水稻研究所、中种集团福建农嘉种业股份有限公司合作育成的杂交稻新品种,作再生稻种植具有头季产量高、再生能力强、抗病强等特点。主要介绍了天优673在建瓯市南雅镇作再生稻种植表现及栽培技术措施。