红黄壤土壤结构改良剂应用效果研究

摘要

为探明红黄壤土壤结构改良剂在红壤旱地上应用的改土培肥效果及其不同用量的产量效应，在典型红壤丘陵区选取3个不同试验点，设计不同用量处理并以花生、红薯、烟草为供试作物进行田间试验，2年定位试验的结果表明：在红壤旱地上施用红黄壤土壤结构改良剂可有效调节土壤酸性、改善土壤结构、提高土壤养分及有机质含量，具有较好的改土培肥效果，其中土壤pH值提高了0．15～0．19、土壤容重降低了5～6个百分点、土壤有机质提高了2．2～2．8 g/kg；在花生、红薯、烟草上应用，其适宜施用量分别为1500～2000、2250～3000、1500～1800 kg/hm2，与对照（不施改良剂量）相比分别增产8％～11％、9％～14％、6％～9％，效益明显。%In order to explore the effect of improving soil structure and fertility of Red -Yellow Soil Conditioner ( RYSC) appli-cation in red soil upland and its yield -increasing effect under the condition of different application rates , we carried out peanut , sweet potato and tobacco field tests for the application rate of RYSC at three test points in the representative hilly red soil region . The results of 2-year location tests indicated that the application of RYSC in the red soil upland had favorable effect of improving soil structure and fertility , it could effectively adjust soil acidity , improve soil structure , and increase soil nutrient and organic mat-ter content.After the application of RYSC, the soil pH -value was increased by 0.15~0.19, the bulk density of soil was de-creased by 5~6 percent, and the soil organic matter content was enhanced by 2.2~2.8 g/kg.As for the application of RYSC in peanut, sweet potato and tobacco fields , its suitable application rate was 1500~2000, 2250~3000, 1500~1800 kg/hm2 respec-tively, and the yield was increased by 8%~11%, 9%~14%, 6%~9%respectively in comparison with the control ( without the application of RYSC ) .