【摘要】：在甘肅河西綠洲灌區(qū),通過(guò)定位試驗(yàn)研究了長(zhǎng)期施用綠肥減施化肥對(duì)復(fù)種毛葉苕子鮮草產(chǎn)量和土壤肥力的影響。結(jié)果表明,施用綠肥與減施化肥并復(fù)種毛葉苕子可生產(chǎn)優(yōu)質(zhì)綠肥鮮草17 093~19 110 kg/hm2;減施化肥30%的處理較農(nóng)民習(xí)慣施肥增效12 091元/hm2,經(jīng)濟(jì)效益提高64.7%,土壤有機(jī)質(zhì)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(jī)質(zhì)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(nóng)業(yè)科學(xué)院土壤肥料與節(jié)水農(nóng)業(yè)研究所;農(nóng)業(yè)部甘肅耕地保育與農(nóng)業(yè)環(huán)境科學(xué)觀測(cè)實(shí)驗(yàn)站;中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所;
【基金】：甘肅省農(nóng)業(yè)科學(xué)院科技創(chuàng)新工程學(xué)科團(tuán)隊(duì)項(xiàng)目(2015GAAS03);甘肅省農(nóng)業(yè)科學(xué)院青年基金項(xiàng)目(2014GAAS16) 公益性行業(yè)(農(nóng)業(yè))科研專(zhuān)項(xiàng)(201103005-04) 國(guó)家綠肥產(chǎn)業(yè)技術(shù)體系(GARS-22-Z-16)
【分類(lèi)號(hào)】：S158;S551.2
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本文編號(hào)：2335191