本文選題：定位施肥 + 紫色菜園土壤�。� 參考：《長江流域資源與環(huán)境》2016年10期

【摘要】：基于紫色菜園土壤3年12季連續(xù)蔬菜(萵筍-白菜輪作)定位施肥試驗(yàn),研究不同施肥條件對土壤鉀素形態(tài)和供鉀水平的影響。采用田間試驗(yàn)和室內(nèi)化學(xué)分析結(jié)合的方法測定不同施肥處理土壤鉀素形態(tài)的變化和蔬菜產(chǎn)量的關(guān)系。結(jié)果表明:紫色菜園土壤鉀素主要以礦物鉀為主,占全鉀的95.11%~97.33%,土壤緩效鉀和速效鉀分別占土壤全鉀的2.22%~3.38%和0.44%~1.52%。連續(xù)施用鉀肥顯著提高土壤速效鉀和緩效鉀含量,以增鉀處理作用最優(yōu)。定位施肥顯著提高土壤水溶性鉀、非特殊吸附鉀、特殊吸附鉀含量,以有機(jī)無機(jī)肥料配施作用優(yōu)于單施化學(xué)肥料。土壤水溶性鉀、非交換性鉀與土壤有效磷含量呈顯著或極顯著正相關(guān),萵筍和白菜產(chǎn)量與紫色菜園土壤速效鉀、緩效鉀含量呈顯著正相關(guān)。定位施肥協(xié)調(diào)紫色菜園土壤鉀形態(tài),改善土壤供鉀能力,以有機(jī)無機(jī)肥料配施作用為優(yōu)。
[Abstract]:The effects of different fertilization conditions on soil potassium forms and potassium supply levels were studied based on three years and 12 consecutive seasons of vegetables (lettuce and cabbage rotation) in purple garden soil. The relationship between the change of soil potassium form and the yield of vegetables was determined by the combination of field experiment and chemical analysis in laboratory. The results showed that potassium in purple garden soil was mainly composed of mineral potassium, which accounted for 95.11 ~ 97.33% of total potassium, and slow available potassium and available potassium accounted for 2.223.38% and 0.44% of total potassium, respectively. Continuous application of potassium fertilizer significantly increased the content of available potassium and slow available potassium, and the effect of potassium increasing was the best. The content of water-soluble potassium, non-special adsorbed potassium and special adsorbed potassium were significantly increased by localizing fertilization. The effect of organic inorganic fertilizer combined with chemical fertilizer was better than that of chemical fertilizer alone. Soil water-soluble potassium, non-exchangeable potassium and available phosphorus content were significantly or extremely positively correlated, lettuce and cabbage yield were positively correlated with available potassium and slow available potassium content in purple vegetable garden soil. The combination of organic inorganic fertilizer and organic inorganic fertilizer was the best way to coordinate the potassium form of purple vegetable garden soil and improve the ability of soil potassium supply.
【作者單位】： 西南大學(xué)資源環(huán)境學(xué)院;四川省農(nóng)業(yè)科學(xué)院土壤肥料研究所;
【基金】：農(nóng)業(yè)部公益性行業(yè)科研專項(xiàng)(201203013) 國際植物營養(yǎng)所(IPNI)項(xiàng)目(Chongqin200808)~~
【分類號】：S158

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本文編號：1865969