摘要
为了给中国番茄测土施氮提供有效参考,使用"零散试验数据整合法"和"养分平衡-地力差减法新应用公式",进行中国番茄土壤氮素丰缺指标与推荐施氮量研究.结果表明:中国番茄土壤碱解氮第1～7级丰缺指标依次为:≥303.1、189.5～303.1、118.5～189.5、74.1～118.5、46.3～74.1、29.0～46.3 和＜29.0 mg/kg;土壤全氮第 1～7 级丰缺指标依次为:≥3.0、2.0～3.0、1.3～2.0、0.8～1.3、0.6～0.8、0.4～0.6 和＜0.4 g/kg;土壤有机质第 1～6 级丰缺指标依次为:≥77.3、36.6～77.3、17.4～36.6、8.2～17.4、3.9～8.2和＜3.9 g/kg,其中,露地番茄土壤有机质第1～7级丰缺指标依次为:≥55.3、32.8～55.3、19.4～32.8、11.5～19.4、6.8～11.5、4.1～6.8和＜4.1 g/kg,设施番茄土壤有机质第1～4级丰缺指标依次为:≥43.4、14.6～43.4、4.9～14.6和＜4.9 g/kg.当氮肥当季利用率为40％、番茄目标产量为120 t/hm2时,土壤氮素丰缺级别第1～7级的推荐施氮量依次为0、81、162、243、324、405和 486 kg/hm2.
Abstract
In order to provide a theoretical basis for nitrogen(N)application in tomato soil testing,the abundance-deficiency index(ADI)of soil N and the recommended N fertilizer application rate(RNFAR)for tomatoes in China were established by using the method of integrating piecemeal experiment data and the new application formula of nutrient balance-soil fertility difference subtraction.The results showed that ADIs of soil alkaline hydrolysis N for tomatoes in China from the 1st to 7th levels were ≥303.1,189.5-303.1,118.5-189.5,74.1-118.5,46.3-74.1,29.0-46.3 and＜29.0 mg/kg,respectively;ADIs of soil total N for tomatoes in China from the 1st to 7th levels were ≥3.0,2.0-3.0,1.3-2.0,0.8-1.3,0.6-0.8,0.4-0.6 and＜0.4 g/kg,respectively;ADIs of soil organic matter(all fields)for tomatoes in China from the 1st to 6th levels were ≥77.3,36.6-77.3,17.4-36.6,8.2-17.4,3.9-8.2 and＜3.9 g/kg,respectively;ADIs of soil organic matter(open fields)for tomatoes in China from the 1st to 7th levels were ≥55.3,32.8-55.3,19.4-32.8,11.5-19.4,6.8-11.5,4.1-6.8 and＜4.1 g/kg,respectively;ADIs of soil organic matter(facility fields)for tomato planting in China from the 1st to 4th levels were ≥43.4,14.6-43.4,4.9-14.6 and＜4.9 g/kg,respectively.When N fertilizer use efficiency was 40％in tomato season and projected tomato yield was 120 t/hm2,RNFAR from the 1st to 7th levels of soil N abundance-deficiency were 0,81,162,243,324,405 and 486 kg/hm2,respectively.
维普
万方数据