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黑龙江省西部是风沙、干旱、盐碱地区,落叶松育苗难度较大。为了适应扩大造林树种的需要,长期以来,对盐碱地落叶松育苗作了多次试验,现将落叶松育苗的技术特点分述如下: 一、土壤改良内陆盐碱土具有土粘,通气性不良的特点,尤其是在以钠盐为主,pH值8.0～8.5,总盐量0.13%的碱性碳酸盐黑钙土上育苗,土壤不经改良或者改良不当,育苗很难成功。近年来,我们通过综合和单项改土的比较,证明用腐植酸磷(褐煤加过磷酸钙)进行改土育苗效果最好,即幼苗不论在遮荫或全光下均能生长良好。土壤改良后经土壤分析,盐分、养分状况有了变化,测定结果和苗木生长比较,见下表:
West of Heilongjiang Province is sandstorm, aridity, salinization area, larch seedling nurturing is more difficult. In order to adapt to the needs of expanding afforestation tree species, for a long time, the saline-alkali larch seedlings have made many trials, now larch seedling technical characteristics are described as follows: First, the soil improvement Inland saline soil with clay sticky, poor ventilation Characteristics, especially in the alkaline carbonate chernozem, which is mainly composed of sodium salt, pH 8.0-8.5 and total salt content 0.13%, can not be raised without improvement or improper improvement. In recent years, we have proved that the effect of soil improvement by using humic acid phosphorus (lignite and superphosphate) is the best, that is, the seedlings can grow well under shading or full light through the comparison between comprehensive and single soil amendment. Soil improvement after soil analysis, salt, nutrient status has changed, the measured results and seedling growth compared to the table below: