修剪对初果期仁用杏树发育枝的影响

连续 2年对仁用杏树进行修剪 ,结果表明 ,4～ 5年生树 ,主枝延长枝剪去枝长的 1/ 2 ,成枝率高 ,有利于幼树的生长和扩冠 ;侧枝延长枝剪去枝长的 1/ 3,成枝率低 ,并可减少营养枝的数量 ;疏除树冠内膛直立枝和外围竞争枝 ,可改善树体光照条件 ;缓放和轻剪树冠外围强枝 ,有利于全树总枝量和生长点的增加 ;轻剪或中剪树冠外围弱枝 ,有利于短枝的形成和枝组的更新复壮。此外 ,对最长新梢和≥

太行山石灰岩区隔坡复式梯田山地经济林模式研究

The pattern of economic forest of double terraced field with slope interval was studied systematically, including the measures of increasing soil moisture, fertilization and fruit yield. The results showed that soil moisture of double terraced field with slope interval(main terrace) in growing season was 2 1% higher than that of ternace without slope interval. The yield of dry grass in auxiliary terrace was 1kg/m 2, which can be used in burying fresh grass into soil of main terrace or covering the surface of the main terrace soil, so as to increase the soil nutrient contents of the main terrace. The kernel yield of 5-year old individual apricot tree with sweet kernel increased 69 4% compared with terrace without slope interval. And there was significant difference in tree growth between terrace with and without slope interval.

丘陵旱坡地仁用杏园蓄水保墒技术研究

旱坡地仁用杏园挖蓄水沟、树盘覆盖地膜和秸草,可显著蓄集天然降水,增加土壤水分,减少水分流失。挖蓄水沟一般降水可全部蓄集保存,不出现径流;树盘覆草、挖蓄水沟都可增加土壤含水量,减少土壤水分蒸发。