長期施用有機肥對潮土土壤肥力及硝態(tài)氮運移規(guī)律的影響
[Abstract]:Four treatments were set up in wheat-maize rotation field where organic fertilizer was applied continuously for different years: continuous application of chemical fertilizer (long-term chemical fertilizer, no organic fertilizer), three years of continuous application of organic fertilizer (no chemical fertilizer); Five years of continuous application of organic fertilizer (no fertilizer) and 20 years of continuous application of organic fertilizer (without chemical fertilizer) to explore the soil fertility, wheat yield and soil nitrate accumulation distribution under different years of continuous organic fertilization. The results showed that the continuous application of organic fertilizer could significantly reduce the bulk density of soil and increase the content of available nutrients in the soil, and the longer the number of years was, the more obvious the effect was. The wheat yield of chemical fertilizer treatment was significantly higher than that of organic fertilizer treatment, and the wheat yield decreased with the increase of fertilizer years, but there was no significant difference in wheat yield between organic fertilizer treatment and organic fertilizer treatment. The accumulation of nitrate nitrogen in different soil depth showed that organic fertilizer treatment was larger than inorganic fertilizer treatment, wheat season was larger than maize season. With the increase of soil depth, the accumulation of nitrate nitrogen decreased first and then increased, and the accumulation of nitrate nitrogen increased with the application of organic fertilizer. It was found that the maximum accumulation of nitrate nitrogen in this layer was 240 kg hm~ (-2) after 20 years of continuous application of organic fertilizer. It can be seen that continuous application of organic fertilizer can reduce wheat yield, and the total accumulation of nitrate nitrogen in soil and the accumulation of soil layer are the largest in 20 years of continuous application of organic fertilizer, and there is a certain risk of nitrate leaching. Therefore, some measures should be taken to increase crop yield, reduce nitrate accumulation and prevent groundwater nitrate pollution.
【作者單位】: 山東省農(nóng)業(yè)科學院農(nóng)業(yè)資源與環(huán)境研究所;農(nóng)業(yè)部黃淮海重點實驗室;山東省農(nóng)業(yè)面源污染防控重點實驗室;新西蘭農(nóng)業(yè)科學院魯亞庫拉研究中心;山東省農(nóng)業(yè)科學院;
【基金】:公益性農(nóng)業(yè)行業(yè)科研專項(201503106) 山東省農(nóng)業(yè)科學院農(nóng)業(yè)科技創(chuàng)新工程項目(CXGC2016B09) “海外泰山學者”建設工程專項 山東省自然科學基金項目(ZR2016DB28) 山東省農(nóng)業(yè)科學院青年科研基金項目(2016YQN40)~~
【分類號】:S158
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