草浆地膜覆盖对土壤水热状况及冬青稞幼苗生长的影响

Influence of straw pulp film mulching on hydrothermal conditions of soil and seedling growth of Hordeum vulgare

采用对比方法,研究了草浆地膜的水热效应,以期明确草浆地膜对青稞生长状况的影响。结果表明,与对照相比,草浆地膜处理0～5 cm土层土壤平均温度为-0.1℃,略高于对照的-0.67℃,差异不显著,但0～10 cm土层土壤含水量显著高于对照;同时,草浆地膜处理下的幼苗植株叶片叶绿素平均值、叶片平均宽度、平均茎粗等指标均高于对照,幼苗外形较为粗壮,叶色浓绿,植株长势较好,田间地表光照强度指标优于对照。运用投影寻踪模型对草浆地膜覆盖下土壤水热和植物生长指标的综合评价结果表明,草浆地膜处理各项指标函数投影值为2.5273,明显优于对照的1.3691。草浆地膜覆盖改善了田间土壤水热状况,从而促进了青稞幼苗的生长。

Hydrothermal effects of straw pulp film was researched to clarify its practical effects on growth conditions of Hordeum vulgare,comparison with CK in the winter.The results showed that the average soil temperature of 0-5 cm layer in the treatment of straw pulp film,which was-0.10 ℃,was higher than the CK（-0.67 ℃）,and no significant difference among them,but water content was significantly induced （n=3,p0.05） compared with CK.At the same time,the value of SPAD,the average width of leaves and average stem diameter also were higher than that of CK,so seedlings formed a more sturdy,dark and green leaves,the plants were growing well,and light intensity in the surface of soil was lower than that of CK. And PPC（Projection Pursuit Classification） model based on RAGA（Real coding based Accelerating Genetic Algorithm） was applied to evaluated the hydrothermal effects and growth conditions of Hordeum vulgare,the projection values（2.5273） was got in the treatment of straw pulp film,which was obviously higher than that of CK（1.3691）.So the application of straw pulp film could improved hydrothermal conditions and promoted the growth of seedlings.