控释肥对土壤养分和杏树生长及产量品质的影响

为了明确控释肥在杏树上的施用效果,以普通复合肥(CCF)做对照,研究了等量控释肥(RCF1)、减量控释肥(RCF2)、减氮控释肥(RCF3)对土壤和杏树养分、杏树生长以及杏果实产量品质的影响。结果表明,控释肥养分释放基本与杏树生长相一致,能增加杏树叶片叶绿素含量,增加枝条长度,提高杏树叶片养分和冬季枝条储存养分含量,施肥效果因控释肥的种类和施用年限的不同有所差异;连续施用两年后,控释肥可以提高杏产量和果实品质;控释肥即使减量20%后,产量与普通复合肥相当,一些生长与品质指标甚至超过普通复合肥处理。

Effects of Release controlled Fertilizers on Soil Nutrients and Growth, Yield and Quality of Apricot Trees

To understand the fertilizer efficiency of release controlled fertilizers on apricot trees, apricot cultivation experiment was carried out to study the effects of equivalent amount release controlled fertilizer(RCF1), decrement release controlled fertilizer(RCF2), less nitrogen release controlled fertilizer(RCF3) on nutrients of soil and apricot trees, on growth and fruit quality of apricot trees by comparison with common compound fertilizers(CCF). The results indicated that nutrient release rules of release controlled fertilizers were basically in accordance with the growth of apricot trees. The release controlled fertilizers could increase chlorophyll content of apricot trees'' leaves, shoot length of apricot trees, and nutrient in the leaves and winter branches of apricot trees. However, the effects of release controlled fertilizers were different as fertilizer varieties and application time. After two years of continuous application, yield and fruit quality of apricot were improved. In the treatment of 20 percent reduction of release controlled fertilizer, the yield was still equivalent with common compound fertilizer treatment, and some growth indexes and quality indexes were even surpass common compound fertilizer treatment.