宁夏主要枸杞产区施肥现状与土壤养分特征

发布时间：2018-01-19 13:37

  本文关键词： 枸杞 施肥现状 土壤养分 土壤NO--N累积　出处：《干旱地区农业研究》2016年02期 　论文类型：期刊论文

【摘要】：为了摸清宁夏主要枸杞产区施肥现状和土壤养分丰缺状况,采用问卷调查的方式分别调查了宁夏中宁(n=112)和惠农(n=20)不同树龄枸杞施肥种类和施肥量等情况,并分别通过48和18个监测点的土样采集与测定,分析评价了其土壤养分含量现状。结果表明,中宁枸杞施肥采用有机无机配施,而惠农枸杞重施化肥,两地枸杞施用化肥种类以尿素、二铵和复合肥为主(投入农户比例达88.9%~100.0%)。中宁不同树龄枸杞N、P_2O_5、K_2O养分投入量分别为716~909、654~1043、149~194 kg·hm~(-2),惠农分别为549~552、276~285、69~74 kg·hm~(-2)。两枸杞产地0~30 cm耕层土壤有机质、全氮和速效钾平均含量差异不大,但中宁土壤速效磷平均含量(135.7 mg·kg~(-1))明显高于惠农(49.3 mg·kg~(-1))。两枸杞地土壤速效氮素残留以硝态氮为主,且随着树龄增加而增加。6~10年和≥10年中宁枸杞地土壤速效磷含量分别是≤5年的3.3和2.5倍,但两地土壤速效钾含量差异不大。因此,建议宁夏中宁和惠农枸杞生产中,应采用有机无机配施的原则,根据不同树龄枸杞和目标产量,合理控制氮、磷肥总量,适当增施钾肥。
[Abstract]:In order to find out the present situation of fertilization and soil nutrient deficiency in main Lycium barbarum producing areas in Ningxia. A questionnaire survey was conducted to investigate the types of fertilization and the amount of fertilizer applied to Lycium barbarum of different ages in Zhongning, Ningxia, China (112) and Huinong (20), respectively. The present situation of soil nutrient content in Zhongning Lycium barbarum was analyzed and evaluated through the collection and determination of soil samples from 48 and 18 monitoring sites respectively. The results showed that Zhongning Lycium barbarum was fertilized with organic and inorganic fertilizer, while Huanong wolfberry was reapplied with chemical fertilizer. Urea, diammonium and compound fertilizer were the main types of chemical fertilizer applied to Lycium barbarum in both places. The proportion of fertilizer applied to farmers was 88.9% and 100.0%, respectively. In Zhongning County, there were different ages of Lycium barbarum and P _ 2O _ 5. The amount of K _ 2O nutrient input was 7169909 / 65443C 149ng 路hm ~ (-2) ~ (-1) kg 路hm ~ (-2) and 549 ~ 552n ~ (276) ~ 285 / kg 路hm ~ (-2) ~ (-1), respectively. The average contents of organic matter, total nitrogen and available potassium in the soil of 030 cm layer of two Lycium barbarum were not significantly different. But the average content of available phosphorus in Zhongning soil (135.7 mg 路kg ~ (-1)) was significantly higher than that in Huinong (49.3 mg 路kg ~ (-1)). Soil available nitrogen residues were mainly nitrate nitrogen in two Lycium barbarum fields. With the increase of tree age, the content of available phosphorus in Zhongning Lycium barbarum was 3.3 and 2.5 times higher than that in 鈮，

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