發(fā)布時(shí)間：2018-04-03 19:27

  本文選題：長(zhǎng)期施肥　切入點(diǎn)：黃壤　出處：《土壤學(xué)報(bào)》2016年05期

【摘要】：基于長(zhǎng)期定位試驗(yàn),以黔中典型黃壤為研究對(duì)象,采用單因素方差分析、可持續(xù)性指數(shù)、穩(wěn)定性指數(shù)等方法對(duì)長(zhǎng)期定位試驗(yàn)獲取的數(shù)據(jù)進(jìn)行分析和比較,以探討長(zhǎng)期不同施肥處理對(duì)黃壤有機(jī)碳含量、有機(jī)碳平衡量、玉米產(chǎn)量穩(wěn)定性、可持續(xù)性及其相互關(guān)系的影響。結(jié)果表明:(1)與施化肥和對(duì)照處理相比,施有機(jī)肥處理土壤有機(jī)碳含量明顯升高,按大小排序依次為:MMNPK1/2M+1/2NPK1/4M+3/4NPK;(2)施有機(jī)肥處理黃壤有機(jī)碳平衡量為正值,且隨有機(jī)肥施用量增加而增加,相反,施化肥和對(duì)照處理均為負(fù)值,大小依次為:MNPK、M1/2M+1/2NPK1/4M+3/4NPKNPKNKNPN、CKPK,各處理差異顯著;(3)有機(jī)肥與化肥配施、有機(jī)肥單施及氮磷鉀化肥協(xié)調(diào)施用更有利于提高玉米產(chǎn)量,排序?yàn)?MNPK1/4M+3/4NPK、1/2M+1/2NPKNPK、MNPNK、PK、NCK;(4)適量有機(jī)肥與化肥配施可提高玉米產(chǎn)量穩(wěn)定性和可持續(xù)性(可持續(xù)性指數(shù)0.6,變異系數(shù)0.3),其中,1/4M+3/4NPK處理玉米產(chǎn)量穩(wěn)定性和持續(xù)性最好;(5)玉米年產(chǎn)量與黃壤有機(jī)碳平衡量相關(guān)度較高,而玉米可持續(xù)性、穩(wěn)定性則主要受有機(jī)碳含量影響。綜上,有機(jī)肥與化肥配施有利于黃壤有機(jī)碳含量提升、玉米維持高產(chǎn)穩(wěn)產(chǎn)。按適量"減肥"原則,以25%有機(jī)肥配施75%氮磷鉀化肥效果最佳。
[Abstract]:Based on the long-term positioning experiment, the data obtained from the long-term positioning test were analyzed and compared by using single factor variance analysis, sustainability index, stability index and so on, taking the typical yellow soil in central Guizhou as the research object.The effects of long-term fertilization on organic carbon content, organic carbon balance, maize yield stability, sustainability and their relationship were studied.The results showed that compared with chemical fertilizer and control treatments, the soil organic carbon content of organic fertilizer treatment was significantly higher than that of chemical fertilizer treatment, and the order of soil organic carbon content was: 1% MMNPK 1 / 2 M 1/2NPK1/4M 3 / 4 NPK + 2) the organic carbon balance of yellow soil treated by organic fertilizer was positive.On the contrary, the application of chemical fertilizer and control was negative, and the order was: M1 / 2M 1/2NPK1/4M / 3 / 4NPKNPKNKNPNCKPKK, the difference was significant (P < 0.05).Single application of organic fertilizer and coordinated application of nitrogen, phosphorus and potassium fertilizer could improve maize yield.鎺掑簭涓，

本文編號(hào)：1706592