土壤调理剂对红壤pH值及空心菜产量和品质的影响

土壤酸化是制约土壤高产稳产的重要因素,严重影响了我国农业的可持续发展。通过大田试验研究了以碳酸钙为主要原料生产的土壤调理剂对酸性土壤p H值、硅铝率及空心菜产量和品质的影响。结果表明,土壤调理剂可以增加土壤p H值和硅铝率,提高空心菜的产量,改善空心菜的品质;与对照相比,土壤调理剂用量为600~1 800 kg/hm2时,可使土壤p H值增加3.60%~21.65%,空心菜产量增加5.81%~44.45%,维生素C含量增加2.48%~23.97%,可溶性糖含量增加4.18%~26.48%;土壤调理剂对空心菜硝酸盐含量没有显著影响。研究发现,土壤调理剂用量为1 500 kg/hm2时较为经济合理,表面撒施后旋耕是非常合理且有效的施用方法。

Effects of soil conditioner on red soil pH and yield and quality of water spinach

Soil acidification is a key restricting factor to high and stable yields of crop.It also seriously affects the sustainable development of agriculture in China.In this paper,the effects of soil conditioner which mainly consisted of calcium carbonate on red soil pH,silica alumina ratio and vegetable yield and quality were studied through field experiments.The results showed that soil conditioner could significantly increase soil pH and silica alumina ratio,and could also improve water spinach yields and its quality.Compared with the control,soil pH was increased by 3.60%~21.65%,water spinach yield was increased by 5.81%~44.45%,vitamin C content was increased by 2.48%~23.97%,and soluble sugar content was increased by 4.18%~26.48% when the soil conditioner application concentration ranged from 600 to 1 800 kg/hm2.Meanwhile,the nitrate content of spinach had no significantly changes.It was found that the 1 500 kg/hm2 application amount was more reasonable.And,rotary tillage after surface fertilizer was a very reasonable and effective application method.