黄绿木霉T1010定殖动态及其对日光温室耕层土壤结构性状的影响

Develop-trend of Trichoderma aureoviride 1010 Colonization and Effect on Solar-greenhouse Arable Layer Soil Environment by Regulating Soil Bulk Density and Water Stable Aggregate

本研究采用黄绿木霉T1010(Trichoderma aureoviride 1010)制剂处理日光温室番茄连作土壤,探索其在耕层土壤中的定殖动态,进而研究其对日光温室耕层土壤容重和水稳性团聚体等重要结构性状的影响,为应用黄绿木霉T1010改善土壤生态环境,促进番茄生长发育提供理论依据和技术支持。试验于2007年8月至12月安排在山东省寿光市多年连作种植番茄的日光温室中进行,以常规生产区为对照,设黄绿木霉T1010和1/2黄绿木霉T1010两个处理,对照和处理各重复4次。结果显示:随着检测时期的推移,黄绿木霉T1010处理的日光温室耕层土壤黄绿木霉T1010定殖指标存在明显的上升趋势,2007年9月1日、10月1日、11月15日和12月27日四个检测时期分别比对照提高106.6%、232.7%、279.4%、300.8%;水稳性团聚体(>0.25 mm)数量指标也存在明显上升趋势,四个检测时期分别比对照提高36.5%、44.8%、51.4%、63.7%;容重检测指标则存在下降趋势,四个检测时期分别比对照降低2.5%、7.7%、8.3%、11.5%。进一步进行相关分析,土壤水稳性团聚体数量与黄绿木霉T1010定殖指标之间存在显著正相关,相关系数为0.95905,土壤容重与黄绿木霉T1010定殖指标之间存在显著负相关,相关系数为-0.96160。可见,黄绿木霉T1010可在日光温室耕层土壤中长期存活,有效降低土壤容重,增加土壤水稳性团聚体,改善土壤生态环境,有效促进番茄根系的发育,进而促进番茄产量的形成。

In this study,authors determined the Develop-trend of Trichoderma aureoviride 1010（T1010） colonization and the effect on solar-greenhouse arable layer soil environment by regulating soil bulk density and water stable aggregate,and hope to gain information for the application of T1010 to regulate the physical properties of soil in solar-greenhouse.The experiments were carried on the soil in solar-greenhouse of Shouguang with tomato continuous cropping from August 1 to December 31 in 2007,and the experiment had two treatments（T1010 and 1/2 T1010） with conventional production areas as control,the treatments and control repeated for four times.Results indicated that,with the treatment of T1010,the T1010 colonization were increased by 106.6 %,232.7 %,279.4 % and 300.8 %,and the soil water stable aggregate of 0.25mm increased by 36.5 %,44.8 %,51.4 % and 63.7 %,soil bulk density decreased by 2.5 %,7.7 %,8.3 % and 11.5 %,respectively compared to the control at September 1,October 1,November 15,and December 27,in 2007.In general,with the growth period passed,T1010 colonization and soil water stable aggregate presented uptrend,and soil bulk density presented to drop tendency in solar-greenhouse.The results of analyses on Pearson Correlation indicated that there were higher correlated level between T1010 colonization and soil water stable aggregate,the correlation coefficients reached to 0.95905,and higher correlated level between T1010 colonization and soil bulk density,the correlation coefficients reached to-0.96160.It showed that T1010 could be common in the solar-greenhouse soil and tomato root ecosystems,and enhanced the solar-greenhouse soil environment efficiently by arousing the reduction of soil bulk density with the increase of water stable aggregate.And they could promote the yield formation and product quality improvement of tomato by making good influence on the growth of roots,stems and leaves.