论文部分内容阅读
白浆土是本地区主要的农业土壤,微酸性、土壤粘紧、养分贫乏,供肥能力低,物理性质差。因而种植大豆生长不良,产量不高。1973年以来,不少连队对大豆施用石灰,增产幅度在9.6—12％,与施等量过石有相同的效果。但到底每亩施多少石灰才算经济合理?石灰除中和土壤酸度之外还能对大豆起到什么作用?为此,我们对大豆施用石灰的不同用量、施用方法、施用后对土壤理化性质的影响以及对大豆产量的影响进行了研究。 供试土壤属草甸白浆土,黑土层厚18厘米,土壤有机质含量3.5％,土壤pH值6.3。试验设五个处理,即每亩施石灰10斤、30斤、50斤、100斤与对照,三次重复。供试品种红丰二号。小区面积21平方米,行距60厘米,亩保苗23886株。人工平播,除施石灰外不施任何肥料。石灰与种子同层条施,人工除草两遍,不中耕,不起垄。
Albic soil is the main agricultural soil in the region, slightly acidic, soil tight, nutrient-poor, low fertility, poor physical properties. Thus poor growth of soybean cultivation, yield is not high. Since 1973, many companies apply lime to soybeans, with a yield increase of 9.6-12%, which has the same effect as applying equal amounts of stone. But in the end how much lime per acre is considered economic and reasonable? In addition to lime and soil acidity can also play a role in soybeans? To this end, we use different amounts of lime application, application methods, after application of soil physical and chemical properties The impact and impact on soybean production were studied. The test soil is meadow albic soil, the black soil is 18 cm thick, the soil organic matter content is 3.5% and the soil pH is 6.3. Experimental set up five treatment, that is, lime per acre 10 kg, 30 pounds, 50 pounds, 100 pounds and control, three times repeated. Test varieties Hongfeng II. Residential area of 21 square meters, 60 cm spacing, 23,886 acres of seedlings Miao. Artificial broadcast, in addition to lime without applying any fertilizer. Lime and seeds with the same facilities, artificial weeding twice, not cultivating, can not afford ridge.