摘要
经土壤分析和实地调查,江浦胡桥板栗低产有如下几个原因:①土壤缺硼,9个样点的含硼量平均仅0.32μg/g。缺硼有碍板栗受精结实,严重的可导致70％左右的空苞率;②多年不施肥,土壤养份只耗不补,肥力低下,缺磷现象尤其严重。9个样点的P_2O_5含量仅2.41μg/g,其中2个点属低级水平,7个点属极低水平;而板栗需要大量磷素,尤以花期需磷更多;③坡地栽培,缺乏水土保持措施,引起水土流失;④未整形修剪,密度不合理,树体高大,枝条拥挤,相互遮荫,形成冠顶平面结果;⑤不除灌木杂草,使其与板栗争光争肥。今后的改造措施:①挖鱼鳞坑,保水保肥;②增施肥料,特别要增施氮、磷、硼等肥料,花期试行喷硼;③重视整形修剪,逐步回缩树冠;④高枝嫁接换种,结合安排授粉树。
Factories of low product level of chestmut in Hu-Qiao, Jiangpu, has been researched. These factories are: ①Short of boron in soil; ②short of nutrient in soil, especially, short phosphate; ③water and soil erosion; ④chestnut trees have not been pruned; ⑤bush and weeds overgrow. We must adopt appropriate ameliorative measures: apply fertilizer and borox; Conserve water and soil; prune chestnut trees; and cut of bush and weds, etc.
出处
《南京农专学报》
1995年第4期1-5,共5页
Journal of Nanjing Agricultural Technology College
关键词
板栗
产量
低产原因
改造措施
chestnut
factories of low product level
ameliorative measures
