论文部分内容阅读
地处丘陵的南充地区瘠薄土分布广,面积约150万亩,占全区旱地面积30%以上,主要分布在丘陵区的丘顶和丘腰上部三台地。位置高,坡度大,植被少,冲刷强,造成土薄,缺水,肥力低。作物布局历史上小春是以豌豆为主来培肥地力;大春种甘薯覆盖减少冲刷。因此,豌豆在瘠薄土占有重要地位。近年豌豆产区的农民反映,他们的豌豆死苗利害,亩产只有50公斤,比过去产量下降将近一半,有的地块颗粒无收。经调查主要是菌
Located in the hills of Nanchong area barren soil widely distributed, an area of about 150 acres, accounting for more than 30% of the dry land area, mainly in the hilly area of the hilltop and the upper three hill. High location, large slope, less vegetation, erosion, resulting in thin soil, water shortages, low fertility. Crop layout Historically, spring is based on peas to fertilize fertility; spring sweet potato coverage to reduce erosion. Therefore, peas occupy an important position in barren soil. In recent years, farmers in the pea producing area have reported that their peas have benefited from the death of the peas. Only 50 kg per mu is produced, which is nearly half that of the past. Some of the plots have no crop yield. The investigation is mainly bacteria