论文部分内容阅读
通过盆栽试验研究了玉米/豌豆间作条件下,两种施氮水平(0、0.15 g·kg~(-1))及三种分隔方式(不分隔、塑料膜分隔、尼龙网分隔)对玉米、豌豆生长及豌豆结瘤固氮的影响。结果表明:与单作相比,玉米/豌豆间作后对玉米的生长和养分的吸收有显著的促进作用,在整个生育期,玉米生物量的增加量随着豌豆生育期的推进而增加,豌豆苗期、豌豆结荚初期、豌豆收获期玉米的生物量在不施氮肥条件下分别增加:28.5%、32.8%、48.7%;在施氮0.15 g·kg~(-1)时分别增加-8.6%、8.1%、63.2%。在玉米豌豆间作体系中三种分隔方式玉米生物量的大小顺序为:间作不分隔>间作尼龙网隔>间作塑料膜分隔>单作;在不施氮肥时,间作后豌豆苗期生物量与单作相比增加显著,增加幅度达35.8%;随着玉米生育期的推进,间作豌豆的生物量增加幅度随着降低,到豌豆收获期与单作豌豆相比差异不显著。收获时三种分隔方式豌豆生物量的大小顺序为:间作塑料膜分隔>间作不分隔>间作尼龙网隔>单作;在施氮肥时,随着玉米的生长间作豌豆与单作豌豆相比显著减产,收获时三种分隔方式对豌豆生物量的大小顺序为:间作尼龙网隔>间作塑料膜分隔>单作>间作不分隔。与单作相比,间作提高了豌豆的结瘤数;间作不分隔、间作尼龙网隔、间作塑料膜分隔条件下,碗豆的结瘤数分别增加120%、82.5%、22.5%。
A pot experiment was conducted to study the effects of two nitrogen application rates (0, 0.15 g · kg ~ (-1)) and three isolation methods (no separation, plastic film separation and nylon mesh separation) Effect of pea growth and nitrogen fixation on pea nodulation. The results showed that maize / pea intercropping significantly promoted the growth and nutrient absorption of maize compared with monocrops. During the whole growth period, the increase of maize biomass increased with the growth of pea, while that of pea At seedling stage and pea podding stage, the biomass of maize during the pea harvest stage increased by 28.5%, 32.8% and 48.7%, respectively, and increased by -8.6% at 0.15 g · kg ~ (-1) %, 8.1%, 63.2%. In the intercropping system of corn and pea, the three maize biomass in the order of interplastification, intercropping of nylon net and intercropping of plastic film were the order of single cropping. When no nitrogen was applied, the biomass of pea seedling intercropped with single Compared with monoculture peas, pea harvest had a significant increase of 35.8%. With the growth of corn, the increase of inter-pea biomass decreased with the increase of pea harvest. At the time of harvesting, the order of pea biomasses of the three methods was inter-crop plastic film separation> inter-cropping non-separation> inter-netting nylon netting> single cropping. When nitrogen fertilizer was applied, The results showed that the order of the three partitioning methods for pea biomass at harvesting and harvesting was as follows: interlaid nylon netting> interlaminar plastic film separation> single cropping> interplastification. Compared with single cropping, intercropping increased the nodulation number of pea; intercropping with non-spacing and intercrop nylon spacing increased the nodulation number of pea beans by 120%, 82.5% and 22.5% respectively under the plastic film separation conditions.