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为探明滴灌方式下不同水分处理对陕北风沙区温室油桃生长的适用性,选择5a生早熟油桃"秦光6号",设置3个滴灌处理W1、W2、W3和当地漫灌处理(CK)4个水分处理,当任一滴灌处理的土壤含水率达灌水下限50%θf,开始统一灌水,灌水上限分别为90%θf(W1)、75%θf(W2)、60%θf(W3)。经过2017年的预试验处理后,于2018年测定桃树新梢生长量、茎干日最大收缩量(MDS)、叶片叶绿素相对含量(SPAD)、果径以及产量和水分利用效率(WUE)等指标。结果表明:新梢生长量和滴灌灌水量呈正相关,各生育期的MDS均值存在显著差异(P<0.05);各处理叶片的SPAD值在果实第二膨大期和成熟采摘期差异显著,W2在果实生长期SPAD整体居高。果实的生长情况:CK的成熟果实横径和缝径分别为44.3、46.0 cm,而W2达53.3、55.9 cm;W1和W3的单株果个数较W2(49.3)分别高20.8%和5.7%,CK则低至40.7个;但W2单果重显著高于其他处理,达到106.39 g。W1、W... 相似文献
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霞光油桃×NF油蟠桃组合F1代果实主要性状的遗传倾向 总被引:2,自引:0,他引:2
以油桃品种霞光和油蟠桃品系NF杂交组合为试材,分析了F1代果实主要性状遗传倾向.进一步证实了果形遗传符合1对等位基因的分离规律,蟠桃对圆桃为完全显性;果实成熟期属数量性状,后代出现较广泛的分离,45.9%的单株成熟期早于双亲.由于在有性过程中非加性效应的解体,果实大小低于双亲,但仍有9.4%的油蟠桃单株超过油蟠桃亲本.杂种后代果实风味呈现偏甜的趋势,可溶性固形物含量平均值低于双亲,超过双亲的油蟠桃单株仅占4.1%.果重与果形之间呈极显著负相关,可溶性固形物含量与果实成熟期、风味呈极显著正相关,pH值与风味呈极显著正相关. 相似文献
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High temperature stress (HT) is efficient in breaking endo-dormancy of perennial trees. The effects of HT (50°C) on the respiration of dormant nectarine (Prunus persica var. nectariana cv. Shuguang) vegetative buds were evaluated in the research. We found that bud respiration was transiently inhibited by HT and the pentose phosphate pathway (PPP) and the cytochrome C pathway (CYT) were significantly affected. On the substrate level, PPP was activated in the HT-treated buds compared with the control group. However, the activation did mot occur until hours after HT treatment. The tricarboxylic acid cycle (TCA) in both the HT-treated buds and in the control group proceeded at a low level most of the time compared with total respiration. On the electron transfer level, CYT was transiently inhibited by HT but became significantly active in the later stage. CYT operation in the control group exhibited an attenuation process. The alternative pathway (ALT) fluctuated both in the HT-treated samples and in the control. The results suggest that the temporary CYT inhibition and the following PPP activation may be involved in HT-induced bud dormancy release and budburst mechanisms. 相似文献
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于2006年初在滨州市高科技示范园果树区开始进行了实验,测定分析了大棚温度、光照及相对湿度等大棚环境因子对油桃果实大小、色泽、含糖量、含酸量及维生素C含量的影响。试验结果袁明:光照是影响果实品质的主导因子;大棚果实发育动态与5℃的有效积温回归高度显著;高温可提高果实含糖量,降低含酸量;相对湿度对果实品质影响不大。 相似文献
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采用河北顺平露地栽培油桃早红珠、曙光与瑞光5号枝条为试材,比较了不同低温累积量下的萌芽率,并采用7.2℃低温模型和犹他模型对3个品种的需冷量进行估算。结果表明:瑞光5号的需冷量最高,花芽与叶芽分别为7607、00 h;曙光需冷量最低,花芽与叶芽均为640 h;早红珠介于二者之间,花芽与叶芽需冷量分别为7006、40 h;同一品种需冷量年际间差异不大;通过对7.2℃低温模型和犹他模型作比较,发现在该地区7.2℃低温模型更适合。 相似文献