地膜覆盖栽培的春玉米与裸栽的相比，表现为生长快而稳健，光合面积较大。在干物质积累上膜栽春玉米呈单峰曲线，且各时期积累较多；裸栽玉米是双峰曲线，积累较慢。膜栽玉米对Ｎ、Ｐ、Ｋ养分的吸收量较多，吸收时期较长，吸收高峰期出现较迟。Ｎ、Ｐ、Ｋ的吸收比例，每生产１００ｋｇ玉米籽粒所需的Ｎ以及养分在各主要器官的分配趋势与裸栽基本相同。膜栽的玉米亩产可比裸栽增产３５％左右，其主要增产原因是每穗粒数较多。 Compared with bare planted, the spring maize covered with plastic film showed fast and steady growth and larger photosynthetic area. In the dry matter accumulation on the film planting spring corn showed a single peak curve, and accumulated more in each period; bare planted corn is bimodal curve, the accumulation of slower. Membrane planting corn on the N, P, K nutrient absorption more absorption period longer, peak absorption appeared late. The absorption ratio of N, P and K, the N required for producing 100 kg of corn grain, and the distribution trend of nutrients in the main organs were basically the same as those of the naked plant. Membrane planted acres of corn yield increase than bare planted about 35%, the main reason for the increase is more grains per spike.