摘要
为了研究大棚菜田土壤养分及盐分演变特征,采集了不同种植年限(0、5、10、15、20、25、30a)的大棚菜田0～20、>20～40cm土壤样品,测定了主要土壤养分指标、水溶性盐分以及土壤pH值。结果表明:新乡市大棚菜田土壤的培肥期在0～15a,培肥后(15a)土壤有机质质量分数在30g/kg以上,达到较理想状态,碱解氮和速效磷含量表现为富集,质量分数分别在150、90g/kg以上。但是速效钾却在100g/kg以下,较缺乏,并且15a以后还在继续流失。各养分含量随着土壤深度的增加逐渐下降。土壤碱解氮、速效磷含量与有机质呈极显著相关。新乡市大棚菜田土壤中氮磷钾的比例严重失调,出现磷素过量而钾素供应严重不足。土壤盐渍化从大棚种植15a开始发生,与种植年限呈极显著正相关,并且与土壤pH值下降表现同步性。该研究结论期望给新乡市蔬菜大棚土壤的施肥决策提供参考。
The production history of greenhouse was more than 30 years in Muye vegetable production base in Henan Xinxiang. The main planting pattern of this region was wheat and maize rotation before building a greenhouse, but now it is the production of cucumbers and tomatoes in a greenhouse in spring and autumn. In order to study the evolution characteristics of soil fertility and salt of the vegetable field in the greenhouse, the soil sample of the vegetable field in the greenhouse （0-20, 20-40 cm） in different cultivating years （0, 5, 10, 15, 20, 25, and 30） were collected and the main soil fertility index and soluble salt and soil pH values were measured. The results showed that the fertilization period of plastic house soil in Xinxiang is usually around 15 age of cultivating where the content of organic matter therein is ideal, exceeding 30 g/kg. However, at the 15th cultivating years, the contents of alkali-hydrolyzable nitrogen and rapidly available phosphorus are slightly high, exceeding 150 and 90 mg·kg-1 respectively. Regarding the quantity of rapidly available potassium, the soil is in serious shortage of rapidly available potassium whose content is lower than 100 mg/kg, and this continues to decline after 15 cultivating years. The contents of nutrients decline as the depth of soil rises. The contents of organic matter, alkali-hydrolyzable nitrogen, and rapidly available phosphorus in soil of 0-20 cm in depth are 33%, 39.79%, and 18% higher than their contents in soil of 20-40 cm in depth. Judging from the contents of nitrogen phosphorus potassium in soil, plastic houses of different cultivating years are all in serious shortage of potassium, having an oversupply of phosphorus. Hence, great attention should be paid to the fertilization management of plastic house soil in Xinxiang city. The salinization speed of plastic house vegetable field soil slows down within the first 15 years of plantation, and it reaches 0.3% and exceeds the critical value of 0.296% at the 15th cultivating year. Then the saliniz
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2013年第15期83-90,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
河南省重大科技攻关项目(092101310300)
河南省大宗蔬菜产业技术体系建设专项(112102310378)资金资助
关键词
耕种
土壤
pH值
种植年限
大棚菜田
土壤肥力
盐渍化
cultivation
soils
pH
cultivating years
vegetable field
soil fertility
salinization
