板栗是我国特产果品之一,产量高、结果年数长、树冠大,不但能提高荒山、荒岭植被覆盖率,也能极大地提高农民的经济收入,是一种具有较好生态、经济效益的果树。江苏省金坛市从20世纪90年代开始在丘陵山区大力发展了一批板栗园,现在都已进入盛产期。然而,由于长期管理粗放,一些板栗园生长衰落,结果率低,严重影响了果农发展板栗的积极性。为此,笔者对板栗低产园进行了一系列调查,并实地进行了板栗园综合增产技术开发试验,对板栗低产园的成因及增产途径进行了分析探讨。一、板栗低产园的成因分析嫁接品种杂乱,良莠不齐。原金坛市建立了焦扎、蜜蜂球、九家种、处暑红等几个品种作采穗基地,但随着果农自采自接,造成不少板栗园内品系混杂,加上各品系生长发育和传花授粉 Chestnut is one of the special fruits in our country with high yield, long number of results and large canopy, which not only can increase the vegetation coverage of barren hills and fallow hills, but also can greatly improve the economic income of farmers. It is a good ecological and economic benefit Fruit trees. Jintan City, Jiangsu Province, started to vigorously develop a number of chestnut fields in the hilly and mountainous regions in the 1990s and has now entered a prosperous period. However, due to extensive management over a long period of time, some chestnut fields have declined in growth and yield, which has seriously affected the enthusiasm of fruit growers to develop chestnuts. To this end, the author conducted a series of surveys on low-yielding chestnut and conducted experiments on the comprehensive production increase of chestnut and on the causes of the low-yield chestnut and the methods of increasing production. First, the analysis of the causes of chestnut low-yielding garden Graft varieties messy, good and bad. The original Jintan established Jiaozha, bee ball, nine species, Shucu red so several varieties for the earning base, but with the self-extraction of fruit farmers, resulting in a lot of chestnut garden mixed strains, together with the growth of the strains Development and pollination