共查询到18条相似文献,搜索用时 203 毫秒
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不同菜籽饼肥用量对邵阳烤烟品质的影响 总被引:6,自引:0,他引:6
研究了菜籽饼肥不同用量对烤烟生长和品质的影响.结果表明,在烟株生育期内施用菜籽饼肥,均能不同程度地促进烟苗生长发育和品质的提高,邵阳烟区以每667 m2施30kg菜籽饼肥效果最佳,此用量饼肥可协调烟叶内在化学成分,提高感官评吸质量,从而提高烟叶的品质和烟农的经济效益. 相似文献
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为探索适宜常宁市烟区合理的饼肥用量,进行了饼肥不同施用量对烤烟生长发育及产量与质量的影响试验。结果表明,烤烟增施饼肥后株高、茎围、节距、叶面积等农艺性状均有不同程度提高。在常规施用化肥的基础上,增施饼肥225 kg/hm~2可增产4.53%,每1 kg饼肥可增产烤烟0.44 kg,产值提高2 569.8元/hm~2,均价提高0.14元/kg;施用饼肥450 kg/hm~2,可增产4.87%,每1 kg饼肥可增产0.24 kg,产值提高4 949.7元/hm~2,均价提高1.12元/kg。 相似文献
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The effects of different application levels and species of phosphatic fertilizer on Eleocharis dulcis were studied. The results showed that the growth stage of Eleocharis dulcis was not significantly influenced by different levels of phosphatic fertilizer application, with phosphorus level in 195-375 kg/hm~2. With increasing of the phosphorus level, starch and total soluble sugar accumulated, but the yield was not improved significantly. The analysis on the economic benefits showed that the best phosphorus level was 195 kg/hm~2. The growth stage and yield of Eleocharis dulcis were not considerably influenced by different proportions of calcium-magnesia phosphate fertilizer and ammonium dihydrogen phosphate. With increasing of ammonium dihydrogen phosphate, big-fruit rate of Eleocharis dulcis kept growing, but the accumulations of starch and total soluble sugar were decreasing. 相似文献
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棉花施用钾肥增产效应研究 总被引:2,自引:0,他引:2
在民勤县砂壤土上进行的棉花施用不同用量钾肥的效应试验结果表明,在施钾(K2O)9.9~89.1kg/hm2的范围内,棉花皮棉产量随着钾肥用量的增加而提高,各处理较对照增产27.5~103.3kg/hm2,增产率1.8%~6.8%;而施钾量超过69.3kg/hm2时棉花皮棉产量随着钾肥用量的增加而增少;在试验设计施钾范围内,随钾肥施量的增加,田间棉花幼苗长势增强;施用钾肥对提高棉花单铃重、纤维品质有明显作用;从产投比综合考虑,以施钾69.3kg/hm2效果最好。 相似文献
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【目的】探讨间歇浸没式生物反应器(TIBs)对荸荠(Eleocharis dulcis)组培苗快速繁殖的效果,为提高荸荠组培苗繁殖效率及其工厂化生产提供技术支撑。【方法】以初代诱导培养获得的桂蹄2号荸荠组培苗为外植体,利用TIBs系统进行组培快繁,研究荸荠组培苗不同继代代数、接种密度、激素组合及反应器间歇浸没频率等因子对荸荠组培增殖的影响。【结果】经初代诱导培养的第4、5、6代继代材料增殖倍数较高,其中第6代继代苗增殖倍数最高,达31.1倍,到第7代后随继代代数的增加增殖倍数逐渐降低。当接种密度大于15丛/瓶时,外植体污染率达16.0%;当接种密度低于10丛/瓶时,外植体的污染率为0。低于10 min/6 h的间歇浸没频率有利于降低污染率,在6 h内低于15 min的浸没时间有利于降低玻璃化苗率;当激素组合为3.0 mg/L 6-BA+0.01 mg/L NAA时,组培苗增殖倍数达38.5倍,且组培苗生长正常。【结论】在TIBs系统中,采用经初代诱导培养的第5代荸荠继代组培苗,增殖培养基为MS+3.0 mg/L 6-BA+0.01 mg/L NAA+30.0 g/L蔗糖,pH 6.0,接种密度10丛/瓶,反应器间歇浸没频率为10 min/6 h,可获得较好的培养效果。 相似文献
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