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夏天是油桐和杂草生长部旺盛的季节,它们激烈地争水、夺肥,从而严重地影响了油桐的生长和结实。此时,如能及时进行夏铲,对消灭杂草,疏松土壤,减少水分蒸发,增加土壤透气性和蓄水保肥能力,促进油桐的挂果是大有好处的。据凋查,连年间种和铲山的3年生油桐林,表土层0至20厘米土壤有机质含量1.82％,停止二年间种和铲山,土壤有机质含量则下降到1％。油桐在七月以后,花芽开始分化、种子脂仿迅速累积,此时铲山,对当年种仁生长与油脂累积是非常有利的、同时,对花芽分化也有促进作用,有利于第二年开花结果。所以夏铲不仅关系着本年油桐果实的生长发育,也影响到下一年的产量,夏铲的增产效
Summer is the vigorous season of tung tree and weed growing department. They are fiercely fighting for water and taking fertilizer, which will seriously affect the growth and fruiting of tung tree. At this point, if timely summer shovel, on the elimination of weeds, loose soil, reduce evaporation of water, increase soil permeability and water storage and fertilizer capabilities, and promote fruit tung fruiting is of great benefit. According to the investigation, perennial species and shoals of 3-year-old tree forest, topsoil 0 to 20 cm of soil organic matter content of 1.82%, stopped two years of species and shoveling, soil organic matter content decreased to 1%. After the tung tree began to differentiate in July, the seed fat quickly accumulated. At this time, the shovel hill was very beneficial to the growth and fat accumulation of the seed in the same year. At the same time, it also contributed to the differentiation of flower buds and was conducive to flowering the following year result. So summer shovel is not only related to the growth of this year’s tung oil fruit, but also affect the next year’s production, summer shovel increase production efficiency