新型土壤改良剂对夏玉米生理生长特性的影响

Influence on Biological and Vegetal Characteristic of Summer Maize by New Soil Amendment

通过大田玉米试验，验证新型土壤改良剂对夏玉米生育期土壤水分、紧实度及玉米生理生长特性的影响。结果表明，施用改良剂PJG和PFL夏玉米全生育期平均株高、叶面积分别高于对照20．7％、19．75％和51．88％、72．37％；2种改良剂对干物质积累的影响存在差异，影响效果依次为茎干重〉叶干重〉根干重。夏玉米光合速率和叶绿素含量受土壤改良剂影响较大，PJG和PFL分别高于对照29．96％、24．48％和73．36％、68．53％。在0～10cm土层内，施用PJG和PFL后土壤紧实度分别低于对照44．44％和42．91％。施用改良剂PJG后，0～20cm土层土壤含水量维持在田间持水量的77．9％左右，未施用改良荆土壤，夏玉米生育期表层土壤含水量起伏变化较大。土壤改良剂PJG在夏玉米的施用效果略好于PFL。

The article is validate the influence on moisture characteristic, soil compactness, biological and vegetal characteristic of summer maize by new soil amendment use field experimentation of corn. The conclusion is that soil amendment PJG and PFL can increase the stem length and leaf area of summer maize in its whole growth duration, higher than CK 20.7%, 19.75% and 51.88%, 72.37% ; The effect are difference between two soil amendment on the dry matter accumulation, the effect is haulm dry weight〉leaf dry weight 〉root dry weight. The photosynthetic rate and chlorophyll of summer maize with PJG and PFL are higher than CK 29.96% ,24.48% and 73.36% ,68.53%. In the soil layer of 0-10 cm,the soil compactness with PJG and PFL are lower than CK 44.44~7N 42.91% The water content in 0-20 cm soil layer with PJG is 77.9% of field capacity, and the water content in topsoil change greatly in growth duration of summer maize without soil amendment. The conclusion is that the effect on summer maize with soil amend- ment PJG is good than PFL.