粉垄耕作对坝地土壤特性及甘蓝产量的影响

Effect of Fenlong tillage on soil characteristics and cabbage yield in dam land

为揭示粉垄耕作对坝地土壤特性和甘蓝产量的影响,设置平畦旋耕、平畦粉垄30 cm、平畦粉垄40 cm、起垄旋耕、起垄粉垄30 cm和起垄粉垄40 cm共6个处理,测定不同处理对土壤理化性质、酶活性、甘蓝品质与产量的影响。结果显示,在0~20、>20~40 cm土层,与平畦旋耕处理相比,起垄粉垄40 cm处理显著(P<0.05)降低了土壤容重,降幅分别为4.14%、11.45%;显著提高了土壤孔隙度,增幅分别为2.38、5.12百分点;显著降低了土壤pH值(pH值分别下降0.25、0.20)和电导率(降幅分别为25.98%和28.20%);显著提高了土壤的有机质(增幅分别为25.34%、34.57%)、碱解氮(增幅分别为37.89%、18.57%)、速效钾(增幅分别为31.64%、24.64%)、总氮(增幅分别为38.24%、46.67%)、总磷(增幅分别为44.44%、72.22%)含量;显著增强了土壤脲酶(增幅分别为40.06%、166.97%)、过氧化氢酶(增幅分别为25.92%、19.23%)、转化酶(增幅分别为24.01%、50.84%)、碱性磷酸酶(增幅分别为66.67%、26.58%)的活性。与平畦旋耕处理相比,起垄粉垄40 cm处理的甘蓝硝酸盐含量显著降低23.54%,可溶性糖、维生素C、可溶性蛋白质含量分别显著增加34.42%、21.69%、49.39%,单株球重和产量分别显著增加14.50%、13.59%。综上,起垄粉垄40 cm的耕作方式改善了坝地土壤的理化性质,提高了土壤养分含量,激发了土壤酶活性,提升了甘蓝的品质和产量,是本试验条件下的最佳耕作方式。

To reveal the effects of Fenlong tillage on soil characteristics and cabbage yield in dam land,six treatments were set up:flat rotary plowing,flat Fenlong 30 cm,flat Fenlong 40 cm,ridge rotary plowing,ridge Fenlong 30 cm,and ridge Fenlong 40 cm.The effects of the 6 treatments on soil physiochemical properties,enzymes activities,cabbage quality and yield were determined.It was shown that compared with the treatment of flat rotary plowing,in the soil layer of 0-20,>20-40 cm,the ridge Fenlong 40 cm treatment significantly(P<0.05)decreased soil bulk density by 4.14%,11.45%,respectively;increased soil porosity by 2.38,5.12 percentage points,respectively;decreased soil pH value by 0.25,0.20,respectively;decreased soil electrical conductivity by 25.98%,28.20%,respectively;enhanced the contents of soil organic matter(by 25.34%,34.57%,respectively),alkali-hydrolyzable nitrogen(by 37.89%,18.57%,respectively),available potassium(by 31.64%,24.64%,respectively),total nitrogen(by 38.24%,46.67%,respectively),and total phosphorus(by 44.44%,72.22%,respectively);increased the activities of soil urease(by 40.06%,166.97%,respectively),catalase(by 25.92%,19.23%,respectively),invertase(by 24.01%,50.84%,respectively),and alkaline phosphatase(by 66.67%,26.58%,respectively).The nitrate content in cabbage under the treatment of ridge Fenlong 40 cm was significantly decreased than that under the treatment of flat rotary plowing by 23.54%,yet the contents of soluble sugar,vitamin C and soluble protein were significantly increased by 34.42%,21.69%,49.39%,respectively,and the leafy head weight per plant and yield were significantly increased by 14.50%and 13.59%,respectively.In conclusion,ridge Fenlong 40 cm was the best tillage method in the experiment conditions,as it could improve the physiochemical properties of soil,enhance the soil nutrients content and the activities of soil enzymes,and improve the quality and yield of cabbage.