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自1986—1989年,经4年室内试验,田间小区试验和中间试验证明,落叶松、樟子松、红松、小黑杨等主要造林树种育苗中施用稀土具有明显的增产效果。通过试验选出有效稀土剂型是农乐和络合稀土,并确定了施用技术。 经13次发芽试验证明,用0.01—0.05％浓度,稀土水溶液浸种,落叶松和樟子松种子,发芽率提高5％,发芽势提高4.7％,发芽速快0.43天。 31点次田间小区试验证明,以每亩60—100克剂量,在生长旺季喷苗1—2次,落叶松苗高提高9.5—18.1％,地径增粗2.3—6.1％.根系容量增大13.3—29.8％,干物质增加12.4—26.1％,产苗量提高14.8％,成苗率提高5.4％。樟子松、红松、小黑杨增产效果也十分明显。 在全省6个地(市)28个点次的中间试验中,以每亩40—80克剂量的农乐和络合稀土喷苗2次,落叶松等6个树种的苗高、产苗量等各5项考核标志的增产点次占点全部次的74.2％。全部点次综合计算,苗高提高28.4％,地径增粗5.5％,产苗量提高8.4％,成苗量提高31.3％。兴安落叶松、长白落叶松、樟子松、红松4种针叶树平均每亩增产苗木13620株,增产成苗17330株,增加产值239.4元,施稀土成本16.4元,每亩净增效益223元,投入与产出之比为1:15。小黑杨每亩增产成苗1800株,净增效益67.5元,投入与产出之比为1:4。 该项技术使用方法简便易行,增?
From 1986 to 1989, after 4 years of indoor experiment, field plot experiment and intermediate experiment, it was proved that the application of rare earth in the main seedlings of larch, Pinus sylvestris, Pinus sylvestris var. Through experiments, the effective rare earth dosage forms were selected as agronomic and complexed rare earths and the application technologies were determined. Thirteen germination tests showed that germination rate increased by 5%, germination potential increased by 4.7% and germination rate increased by 0.43 days with seed soaking with 0.01-0.05% concentration aqueous solution of rare earth and larch and Pinus sylvestris. 31 points field plot test proved that 60-100 grams per acre dose, in the growing season spray 1-2 times, larch seedling height increased 9.5-18.1%, root diameter thickened 2.3-6.1%. Root volume increased by 13.3 -29.8%, dry matter increased by 12.4-26.1%, seedling output increased by 14.8%, seedling rate increased 5.4%. Pinus sylvestris, Pinus, black Populus yield effect is also very obvious. In the six prefectures (cities) 28 times in the middle of the pilot, the amount of 40-80 grams per acre Nongle and complex rare earth spray 2 times, such as larch seedling height of 6 species of seedlings Volume and other five test marks of production points accounted for 74.2% of all times. According to the comprehensive calculation at all points, the seedling height increased by 28.4%, the diameter increased by 5.5%, the seedling emergence increased by 8.4% and the seedling emergence increased by 31.3%. Larix gmelinii, Larix gmelinii, Pinus sylvestris var. Mongolica, Pinus sylvestris 4 kinds of conifers increased yield per acre 13620, increased production of 17330 seedlings, an increase of 239.4 yuan output value, application of rare earth costs 16.4 yuan, 223 yuan net profit per acre, The ratio of input to output is 1:15. Black Poplar seedlings per acre increased production 1800, net profit 67.5 yuan, input and output ratio of 1: 4. The technology is easy to use, increase?