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超级稻中浙优1号蓄留再生稻高产栽培技术研究 总被引:4,自引:0,他引:4
[目的]为超级稻中浙优1号蓄留再生稻获得高产提供理论依据。[方法]以品种中浙优1号为研究材料,研究头季稻收割成熟度、收割后留桩时间和定桩高度3个因子对再生稻苗情、有效穗、结实粒数、千粒重和实际产量等的影响。[结果]头季稻在80%、85%成熟度时收割再生稻产量最高;头季稻收割后,留桩时间越短产量越高;定桩高度为10 cm时产量最高,其次是15、20、5 cm。[结论]中浙优1号蓄留再生稻时要掌握好头季稻收割成熟度、留桩时间和定桩高度,才能获得高产。 相似文献
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为探索湖北省天门市种植再生稻适宜的留桩高度,以丰两优香1号为试验材料,开展了不同留桩高度对其生长发育动态和产量影响的试验。结果表明,在15~45 cm的留桩高度范围内,随着留桩高度的增加,丰两优香1号再生季稻的生育期缩短,株高升高,再生苗数增多,穗长、穗粒数均降低,有效穗数、再生率均增加,再生季稻产量以45 cm留桩高度处理的最高,为4 570.45 kg/hm~2。从生育期、再生率、产量上综合分析,丰两优香1号再生季应尽可能留高桩。 相似文献
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[目的]确定合适的留桩高度,以便指导再生稻的生产。[方法]采用目前生产上推广的3个中稻品种(深两优5814、两优6326、新两优223),开展50、35和15 cm 3种不同留桩高度试验,分析再生穗的出苗速度、生育期、农艺性状、经济性状和产量等性状的变化规律。[结果]50、35 cm留桩高度处理再生穗的出苗速度、生育期、农艺性状、经济性状和产量等性状都优于15 cm低留桩高度处理。[结论]该研究进一步印证生产实践中留桩高度分别为50、35 cm为农民所接受。 相似文献
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为了进一步探索中浙优1号在不同密度下的丰产和稳产性,进行了4种不同密度栽培试验。结果表明:杂交水稻中浙优1号最适宜栽培密度为每亩10000穴左右。 相似文献
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优质杂交稻“中浙优1号”2012年在福建省将乐县示范种植,表现株叶形态好、适应性强、产量高、米质优;2013年推广种植约980 hm2,产量比当地栽培的优质稻组合“两优2163”、“天优华占”等增产明显;生产上要注意适时播种、移栽,宽行稀植,定量控苗,配方施肥,好气灌溉,综合防治病虫草害. 相似文献
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杂交水稻中浙优1号高产高效技术途径分析 总被引:16,自引:0,他引:16
“中浙优1号”是由中国水稻研究所与浙江省杂交水稻种业有限公司合作育成的单季杂交晚籼稻新组合,是台州单季杂交晚稻的一个主要组合。通过近年来的种植考查显示,中浙优1号株型较好,植株挺拔、剑叶直挺、分蘖力强、长势旺、穗大粒多、结实率高、后期青秆黄熟,功能叶的功能期较长,无明显早衰现象,灌浆历期较长,两次灌浆不明显。该组合属感温性组合,齐穗期随播种期的推迟而推迟,一般生育期为133—139d。据2002年浙江省农科院植物保护与微生物研究所接种鉴定结果, 相似文献
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总结了中浙优1号烟后稻的特征特性,并从播种、移栽、肥水管理、病虫害防治等方面提出了高产栽培技术,以供水稻种植户参考。 相似文献
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再生稻茎生腋芽的生育特性观察 总被引:1,自引:0,他引:1
为探索再生稻高产途径,观察了各节位茎生腋芽的分化、生长、穗粒发育性状和茎生器官形态.结果表明:茎生腋芽在母茎抽穗前按由下而上的节位顺序开始幼穗第一苞分化,在母茎抽穗后按由上而下的节位顺序进入一、二次枝梗分化;在顶端优势控制下,茎生腋芽至母茎黄熟前3 d才开始萌发,萌发成穗率随节位下移而降低,且生长先天不足,每穗粒数仅为母茎的三分之一.争取再生季高产的关键,是在头季收割保留上位优势芽的基础上,大力提高下部茎生腋芽的萌发率,形成比头季多70%~100%的穗数,以多穗补小穗的不足.倒3叶枕比倒2芽着生节部高8~16 cm,其高程可作为简捷诊断母茎适宜留桩高度的形态指标. 相似文献
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Optimal management of nitrogen fertilizer in the main rice crop and its carrying-over effect on ratoon rice under mechanized cultivation in Southeast China 下载免费PDF全文
HUANG Jin-wen WU Jia-yi CHEN Hong-fei ZHANG Zhi-xing FANG Chang-xun SHAO Cai-hong LIN Wei-wei WENG Pei-ying Muhammad Umar KHAN LIN Wen-xiong 《农业科学学报》2022,21(2):351-364
This study attempted to clarify the carrying-over effect of different nitrogen treatments applied to the main crop on the crop population growth and yield formation of ratoon rice under mechanized cultivation in Southeast China. Based on the constant total nitrogen application amounts (225.00 kg ha–1) in the main crop, an experiment with different ratios of basal and topdressing nitrogen fertilizer (the ratio of basal fertilizer:primary tillering fertilizer:secondary tillering fertilizer:booting fertilizer at 3:1:2:4 (N1), 3:2:1:4 (N2), 3:3:0:4 (N3), and 4:3:0:3 (N4), respectively, and a control without nitrogen treatment (N0)) was set up across two consecutive years in field using hybrid rice variety Yongyou 1540 as the test materials. The results showed that the total tiller number and effective tillering percentage increased in the main crop under the N1 treatment, more nitrogen fertilizer applied in late growth stage of the main crop, and its effective tillering percentage of the main crop was the highest at up to 70.18%, which was 9.15% higher than that of conventional fertilization treatment (N4), more nitrogen fertilizer applied in early growth stage of the main crop. The same tendency was observed in leaf area index (LAI) value of the main crop and its subsequent ratoon rice, which were 16.52 and 29.87% higher, respectively, in the N1 treatment than that in the N4 treatment at the full heading stage. The same was true in the case of the transport rates of stem and sheath dry mater and the canopy light interception rates in both the main and its ratoon crops. The transport rate of stem and sheath in main crop rice under N1 treatment increased by 50.57% compared with N4 treatment. The canopy light interception rate of N1 treatment increased by 5.07% compared with N4 treatment at the full heading stage of the ratoon crop. Therefore, the total actual yield was the highest in the main and its ratoon crops under N1 treatment, averaging 17 351.23 kg ha–1 in two-year trials, which was 23.00% higher than that in the conventional fertilization treatment (N4). The results showed that appropriate nitrogen treatment was able to produce a good crop stand in the main crop, which was essential for producing a good ratoon crop population and high yield especially under mechanized cultivation with low stubble height of the main crop. The study suggested that shifting the proper nitrogen application amounts to the late growth stage of the main crop, such as N1 treatment, not only had a higher productive effect on ensuring the yield of the main crop, but also had a positive effect on the axillary bud sprouts from the stubbles for ratoon rice, resulting in an increased percentage of productive panicles and achieving the goal of one planting with two good harvests under the conditions of our study. 相似文献
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播种期对超高产再生稻生育及干物质生产的影响 总被引:1,自引:0,他引:1
以两优培九为材料,研究了播种期对超高产再生稻干物质生产的影响.结果表明,早播早栽的头季生长期延长,再生季生长期缩短;头季分蘖高峰期延长,分蘖数增多;头季籽粒干重增长较快,从抽穗后6~25 d左右,粒重迅速提高,此后粒重增长趋于平缓;晚播晚栽的头季籽粒干重增长较慢.早播早栽的头季产量增长7.18%~9.56%,再生季增长53.47%. 相似文献