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泡桐是我国速生用材树种之一。它具有适应性强、生长快、用途广、繁殖容易、适 合桐农间作等特点,深受广大群众的欢迎。大力种植泡桐,对于绿化祖国,促进农业稳产高产有显著效果。我省苏北平原发展泡桐生产潜力很大,我们必须大力提倡种植。为 了提供速生、优质、干形好、抗性强的泡桐新品种,我所从今年开始进行泡桐引种试验, 现将一年来的工作情况简报如下: 一、试验地概况 试验地位于我所公墓山西北坡山脚下的苗圃地,由于山坡遮阴,终年日照时间偏短, 对泡桐生长有些影响。苗圃地地势平坦,为冲积性黄棕壤,质地偏粘,中壤质至重壤质, 呈酸性反应,PH6左右,由于长期耕种和施肥,土壤较肥沃,根据多次测定,有机质为2％左右,全氮0.1％,速效磷6PPM左右,速效钾45PPM。在圃地下方有水塘,雨季 在地表潜层水影响下,有临时积水现象。 根据本所所在地江宁县气象站资料,一九五六年至一九七五年历年平均分月气象情
Paulownia is one of the fast-growing timber species in our country. It has adaptability, fast growth, wide use, easy propagation, suitable for Tongnon intercropping and other characteristics, welcomed by the masses. Vigorously planting paulownia, greening the motherland and promote agricultural production and yield have a significant effect. The development of paulownia in the northern Jiangsu plain has great potential for production, and we must vigorously promote planting. In order to provide fast-growing, high-quality, good dry, strong resistance Paulownia new varieties, we start from this year for Paulownia introduction test, now the work of the briefing is as follows: First, the test site Overview Experimental site in our cemetery Shanxi The foot of the northern slope of the nursery, shade due to hillsides, short sunshine all year round, some growth of Paulownia impact. Nursery terrain is flat, alluvial yellow brown soil, texture sticky, medium loamy to heavy loamy, acidic reaction, PH6 or so, due to long-term cultivation and fertilization, the soil is more fertile, according to many determinations, the organic matter is 2% About 0.1% of total nitrogen, available phosphorus 6PPM or so, available potassium 45PPM. There are ponds in the ground below the water table. Under the influence of the surface sub-surface water during the rainy season, there is a temporary waterlogging phenomenon. According to the data of Jiangning County Meteorological Station where the institute is located, the average monthly meteorological situation between 1956 and 1975