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核桃休眠期伤流规律的研究 总被引:4,自引:0,他引:4
核桃伤流在整个休眠期中任何时间修剪均有发生。无论枝条粗细 ,剪后 7~ 10天内有不同程度的伤流从剪锯口大量流出 ,以后急剧减少 ,虽有波动 ,但没有大的高峰。核桃 1年生枝伤流量较少 ,其次是粗 3~ 5cm的枝 ,5cm以上枝伤流量较多 ,且持续的时间长。核桃伤流的多少 ,受当时气温、地温的影响较大 相似文献
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核桃树休眠期间修剪伤流严重,为了减少伤流,促进核桃树体生长,在秦岭山区以休眠期修剪为对照,在核桃落叶前、萌芽前及萌芽后进行修剪,监测不同修剪时期对枝条伤流量、剪口枯枝长度、萌芽率、成枝率、枝条生长状况及结果状况等的影响.结果表明:休眠期(对照)修剪的伤流量最大且持续时期最长,且极显著高于萌芽前修剪;与休眠期(对照)相比,3个修剪时期的剪口枯枝长度均显著或极显著减小;落叶前和休眠期(对照)修剪的萌芽率均较高,萌芽前修剪居中,萌芽后修剪的较低;萌芽前修剪的成枝率最高,极显著高于其他3个修剪时期;萌芽前修剪的雌花序数、雌花数、结果数、翌年结果母枝数均高于其他修剪时期,且1年生枝长势最好.综上,推荐秦岭山区核桃在萌芽前15d左右进行修剪,可减少伤流,提高核桃产量,促进枝条生长. 相似文献
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结合洛阳市自然概况,从园地选择、品种选择、苗木选择、栽植、土肥水管理、花期管理、整形修剪、病虫防治、适时采收等方面总结洛阳地区早实核桃丰产栽培技术。 相似文献
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Eight common tree species used for urban landscaping were examined in this study for the effect of branch pruning on the rate and extent of wound closure (occlusion) and internal discolouration in the stem. Rate of wound closure when branches were removed with stem or branch of origin (flush cut pruning) and cuts made away from the branch collar (natural target pruning) were compared on all species over a 3-year period. Understanding the effects of pruning will benefit urban foresters in tree selection and potentially prevent downstream challenges associated with mechanical injury. The findings for all eight species supported the recommended guidelines of retaining the branch collar during pruning which has shown to facilitate effective wound closure. The exposed wood diameter (exposed) for all species were significantly reduced after the second growing season for injuries derived through natural target pruning but for the same period, injuries derived through flush cut pruning, only six species showed significant reductions in exposed wood diameter. Two other species (Mimusops elengi and Lagerstroemia speciosa) were observed to have no further reduction in exposed wood following the first growing season. Both wound inducing techniques (flush cut pruning and natural target pruning) resulted in no significant change in healing tissue production following the second growing season. Correlation analysis showed a strong positive relationship (r = 0.8–0.9) between the width of the wound and the length of discolouration in the stem, suggesting that smaller cuts were better suited to avoid extensive wound induced discolouration. This finding was further reinforced through visual observations of numerous pruning wounds of all eight species which showed that smaller cuts were better able to close over as opposed to larger wounds. 相似文献
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J.K. Bore D.K. Isutsa F.M. Itulya W.K. Ng’etich 《The Journal of Horticultural Science and Biotechnology》2013,88(2):272-277
SummaryAn experiment was conducted at Kipkebe Estate, Sotik, Kenya, with the aim of establishing the effects of pruning time and resting period on total non-structural carbohydrate (TNC) reserves, regrowth and yield of tea. In this experiment, tea bushes were freely left unplucked for 45 and 90.d before pruning. Control treatments were continuously plucked until pruning. Results showed that TNC was significantly (P≤0.05) increased at pruning time. October pruning significantly increased leaf, stem, and root TNC. A longer resting period of 90.d significantly increased leaf and root TNC to 294 and 230.gkg–1, respectively. Generally, TNC declined after pruning and thereafter increased. Root TNC significantly correlated with regrowth period, diebacks and yield. Generally, the best resting period for increased TNC, regrowth and yield, is between 45 and 90.d. The best pruning time is October, if drought stress can be avoided. 相似文献
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核桃果实发育动态规律研究 总被引:3,自引:0,他引:3
以早实核桃"辽核1号"、"香玲"、"辽核5号"为试材,研究不同核桃品种在豫北平原地区果实发育动态规律。结果表明:不同核桃品种果实的纵径、横径和侧径发育在同一时期内均显现出相对快速增长的一致性。但品种间三径生长发育有着明显的差异性。同时也表现出核桃果实三径发育动态相对一致的周期规律性,分为果实迅速膨大期和缓慢增长期2个生长发育周期。5月上旬至6月上旬是果实膨大期,完成果实体积膨大的95%以上。6月中旬至9月上旬处于果实缓慢增长期,果实增大值仅占总体积的5%左右。 相似文献
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‘洛核1号’是从‘彼特罗’ב中林5号’杂交子代中选育的高抗晚熟核桃新品种。坚果长椭圆形,大,平均单果质量16.46 g,单个核仁质量8.38 g,壳厚1.30 mm,出仁率达50.81%。壳较光滑,纵径47.33 mm,横径35.50 mm,侧径41.00 mm。缝合线略凸起,结合紧密。核仁饱满,黄色,口感浓香,无涩味,腹缝线结合紧密。果实生育期126 d,在洛阳地区9月15号左右成熟,侧芽结果率80%。‘洛核1号’对核桃炭疽病和核桃细菌性黑斑病表现为抗病,耐干旱、耐瘠薄能力较强。在河南省广大地区可进行生产性栽植,栽植当年可见雌花,第二年见果,高接大树第4年666.7 m^2平均产量203.72 kg。 相似文献
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“西林3号”核桃果实生长规律Logistic模型研究 总被引:2,自引:0,他引:2
以西北农林科技大学核桃板栗试验示范站栽培的"西林3号"核桃为材料,通过物候观测和果实生长动态测定,采用Logistic曲线对其果实生长动态测定值进行了拟合,并计算出果实生长的各个时间段。结果表明:"西林3号"核桃果实纵径、横径及线径生长量与其生长时间的关系均与Logistic模型高度吻合,确定系数R2分别为因变量的99.38%、99.42%和99.05%,回归方程统计检验均达极显著水平;果实纵径、横径及线径生长过程可划分为生长初期、快速生长期和稳定生长期3个阶段,为确定不同阶段核桃栽培管理措施提供了参考依据。 相似文献