不同用量土壤改良剂对碱茅生长及土壤养分的影响

Effects of different dosages of soil conditioner on the growth of Puccinellia tenuiflora and soil nutrients

为明确土壤改良剂不同用量对碱茅生长发育及土壤养分的影响,通过田间试验分析施用不同量土壤改良剂对碱茅产量、营养品质及土壤养分、水分变化的影响。结果表明:施用改良剂能显著提高碱茅产量,当改良剂施用量达到30 t·hm^(-2)时,碱茅产量达到最大值;土壤养分含量随土壤改良剂施用量的增加有所增加,在改良剂施用量为30 t·hm^(-2)时达到最高;碱茅营养品质随土壤改良剂施用量的增加变化不一,中性洗涤纤维、酸性洗涤纤维随改良剂施用量的增加而降低,均在改良剂施用量为30 t·hm^(-2)时含量最低,粗脂肪、粗蛋白、淀粉、钙、镁、铁、锌含量均在改良剂施用量为30 t·hm^(-2)时达到最高;土壤改良剂显著影响土壤对水分的涵养能力,施用15、30 t·hm^(-2)土壤改良剂处理较对照的土壤水分含量分别提高了5.15、9.10百分点。综上所述,在土壤改良剂施用量为30 t·hm^(-2)时,土壤养分含量及碱茅生长最佳。

In order to clarify the effects of different dosages of soil conditioner on the growth and development of Puccinellia tenuiflora and soil nutrients,a field experiment was conducted to analyze the effects of different dosage of soil conditioner on yield,nutritional quality,soil nutrients and water content of Puccinellia tenuiflora.The results showed that the application of soil conditioner significantly increased the yield of Puccinellia tenuiflora.When the application dosage of soil conditioner reached 30 t·hm^(-2),the yield of Puccinellia tenuiflora reached the maximum.The soil nutrient content increased with the increase of the application dosage of soil conditioner,and reached the highest when the application dosage of soil conditioner was 30 t·hm^(-2).The nutritional quality of Puccinellia tenuiflora varied with the increase of soil conditioner application dosage.The content of neutral detergent fiber and acid detergent fiber decreased with the increase of soil conditioner application dosage,and the content was the lowest when the soil conditioner application dosage was 30 t·hm^(-2).The content of crude fat,crude protein,starch,calcium,magnesium,iron and zinc reached the highest when the soil conditioner application dosage was 30 t·hm^(-2).Soil conditioner significantly affected the water conservation capacity of soil.Compared with the control,the soil moisture content of 15 and 30 t·hm^(-2) soil conditioner increased by 5.15 and 9.10 percentage points,respectively.In summary,when the application dosage of soil conditioner was 30 t·hm^(-2),the soil nutrient content and the growth of Puccinellia tenuiflora were the best.