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对于没有畜牧业的农业企业来讲,土壤中磷和钾的供给,是非常匮乏的。在种植过程中,这种基本的营养物质,常常被不均匀分配,进而造成不稳定的产量。如果秸秆被焚烧或者被运走,其为家庭所用,磷钾缺乏的问题,对于种植户来讲,将会日益突出。从收割残留物中反取营养成分,便成为了不可能的事情。同样也减少了土壤对磷和钾的吸取。在含有少量磷和钾储量的地表土中(0~30 cm),作物必须从地下吸收所需的营养物质。但由于表土层本身,已缺乏其营养物质,因此,要从深土层(30~60 cm)获取。但随着深度的增加,磷钾的含量也相应减少,多数情况下,其40%~60%的含量存在于表土中。
For agricultural enterprises without livestock husbandry, the supply of phosphorus and potassium in the soil is very scarce. During the planting process, this basic nutrient is often distributed unevenly, resulting in unstable yields. If the straw is incinerated or transported away, it is used by families and the problem of lack of phosphorus and potassium will become increasingly prominent for growers. It is impossible to reverse the nutrients from harvesting residues. Also reduce the soil phosphorus and potassium absorption. In surface soils containing small amounts of P and K (0-30 cm), crops must absorb the nutrients they need from the ground. However, since the topsoil itself has no nutrients, it should be obtained from deep soil (30-60 cm). However, as the depth increases, the contents of phosphorus and potassium decrease correspondingly, and in most cases, the content of 40% -60% exists in the topsoil.