影响平坝华山松种子园结实量的土壤因子及对策研究

本文通过对平坝华山松种子园土壤肥力，针叶养分状况与华山松无性系开花结实相关性的研究，寻找出种子产量低的原因，结果表明低产的原因之一是营养生长差，表现在该园土壤缺Ｐ少Ｋ，缺Ｂ，针叶养分状况反映出Ｂ的缺乏，同时Ｎ，Ｐ，Ｋ也偏低，故而施肥是解决的措施之一，施Ｐ提高雄花量，是对照的１３．５倍，施Ｂ提高雌花量和座果量，为对照的１．２倍，２倍。

Study on the Soil Factors of Affected Seeds Production of Pinus Armandi Seeds Orchard and the Treatments

This paper studied the correlation betwcen thc quantity of blooming and Seeds' production of clones and the soil fertility and fo-liar nutrition in the Pinus Armandi Seeds Orchard in Pinba county to examine the reasons why seed production was low. One of thereasons was the lowcr of thc vegetation. In the Orehard. the soil contained less K. lacking Pand B; from the content of the foliar.B is lack too, at the same time. N .P .K are lower, so using the fertilizers is one of the treatments. Using P-fertilizer (B-fertilizer)can raises the number of male flowcr (female flower and fruit ). The number is 13. 5 times (1. 2 times and 2 times as compared withthe contrast respectively.