论文部分内容阅读
古耕普通黑褐土当地群众称之为红油土,在黄土地区分布较广,生产力高,在农业生产上占有极重要的地位。为了充分发挥其生产潜力,必须正确地施用肥料。在这种土壤上施用氮肥,厩肥对农业生产所起的巨大作用,是人所共知的,但有些肥料(如磷肥)尚无一致认识。有人认为这种土壤“磷质并不缺乏”,也有人说是“稍感缺乏”,“微缺磷”。 解放前后,在古耕普通黑褐土地区内曾作过不少肥料试验,但所得磷肥结果很不一致。有的肥效显著,例如解放前陕农所大荔农场用小麦所作的地力测定,中国科学院土壤研究所用牧草所作的盆栽试验,磷肥增产率均在10％以上,最高超过六倍。有的肥效不显,如解放前中央农业试验所在武功等地
The ancient plain brown cinnamon soil local people call it the red soil, widely distributed in the loess area, high productivity, occupies a very important position in agricultural production. In order to give full play to its productive potential, fertilizers must be applied correctly. It is well-known that the application of nitrogenous fertilizers in such soils to agricultural production has been well known, but there is no consensus on some fertilizers such as phosphate fertilizers. Some people think that this soil “is not lack of phosphorus,” some people say “a little lack of”, “micro-deficiency phosphorus.” Before and after the liberation, a lot of fertilizers were tested in the ancient plain cinnamon fields, but the results of the phosphate fertilizer obtained were very inconsistent. For example, the soil fertility of Dali Farm in Shannong County before liberation was determined by pot experiment with forage grass of Institute of Soil Science, Chinese Academy of Sciences. The increase rate of P fertilizer was above 10% and the highest was more than six times. Some fertilizer efficiency is not obvious, such as the Central Agricultural Experiment before the liberation of martial arts and other places