【摘要】：在甘肅河西綠洲灌區(qū),通過定位試驗研究了長期施用綠肥減施化肥對復種毛葉苕子鮮草產(chǎn)量和土壤肥力的影響。結果表明,施用綠肥與減施化肥并復種毛葉苕子可生產(chǎn)優(yōu)質綠肥鮮草17 093~19 110 kg/hm2;減施化肥30%的處理較農民習慣施肥增效12 091元/hm2,經(jīng)濟效益提高64.7%,土壤有機質和堿解氮含量分別提高1.8g/kg和10.5 mg/kg,而施氮量較高的處理并不利于土壤有機質的積累。施用綠肥7 500 kg/hm2可以代替氮肥67.5~90 kg/hm2,具有培肥土壤和節(jié)能、減排、增效作用。
[Abstract]:In the oasis irrigation area of Hexi Gansu Province the effects of long-term application of green manure and chemical fertilizer on fresh grass yield and soil fertility of multiple cropping hairy vetch were studied. The results showed that applying green manure, reducing chemical fertilizer and replanting hairy vetch could produce 17 0933 (19 110 kg/hm2;) of green manure fresh grass. The treatment of 30% fertilizer reduction increased the economic benefit by 12091 yuan / hm2, and the content of soil organic matter and alkali-hydrolyzed nitrogen increased 1.8g/kg and 10.5 mg/kg, respectively. However, the treatment with higher nitrogen application was not conducive to the accumulation of soil organic matter. The application of green manure for 7 500 kg/hm2 could replace 67.590 kg/hm2, of nitrogen fertilizer with the effects of fertilizing soil, saving energy, reducing emission and increasing efficiency.
【作者單位】： 甘肅省農業(yè)科學院土壤肥料與節(jié)水農業(yè)研究所;農業(yè)部甘肅耕地保育與農業(yè)環(huán)境科學觀測實驗站;中國農業(yè)科學院農業(yè)資源與農業(yè)區(qū)劃研究所;
【基金】：甘肅省農業(yè)科學院科技創(chuàng)新工程學科團隊項目(2015GAAS03);甘肅省農業(yè)科學院青年基金項目(2014GAAS16) 公益性行業(yè)(農業(yè))科研專項(201103005-04) 國家綠肥產(chǎn)業(yè)技術體系(GARS-22-Z-16)
【分類號】：S158;S551.2
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本文編號：2335191