本文選題：耕作方式　切入點(diǎn)：輪作方式　出處：《中國(guó)土壤與肥料》2016年06期 　論文類型：期刊論文

【摘要】：免耕輪作對(duì)土壤性質(zhì)有明顯改善作用。在免耕秸稈覆蓋基礎(chǔ)上進(jìn)行燕麥、玉米、大豆3種作物輪作2個(gè)周期的試驗(yàn)研究。結(jié)果表明,免耕秸稈覆蓋結(jié)合不同作物輪作能調(diào)節(jié)土壤水熱環(huán)境,增加土壤速效養(yǎng)分含量。土壤貯水量在不同處理間總體表現(xiàn)為免耕留高茬覆蓋(NHS)免耕留低茬覆蓋(NLS)免耕留高茬(NH)免耕留低茬(NL)常規(guī)翻耕(T),3種輪作方式中均以燕麥-大豆-玉米方式最高。輪作2個(gè)周期后NHS、NLS、NH、NL分別較T土壤貯水量在作物苗期增加了16.24%、12.16%、8.75%、5.56%,可見(jiàn)免耕覆蓋能明顯提高土壤水分蓄儲(chǔ)能力。土壤溫度在0~5 cm土層受外界環(huán)境影響最大;免耕覆蓋在低溫時(shí)起"保溫作用",能提高土壤溫度1.4~2.4℃;高溫時(shí)起"降溫作用",能降低土壤溫度1.8~3.4℃;秸稈覆蓋后土壤溫度日變化平緩。同時(shí)免耕結(jié)合輪作處理能不同程度增加土壤有機(jī)質(zhì)及速效養(yǎng)分含量,說(shuō)明免耕輪作在該地區(qū)能較大程度的改善土壤性質(zhì),為提高作物產(chǎn)量提供了基礎(chǔ)和有效保證。
[Abstract]:On the basis of no-tillage straw mulch, three crop rotation periods of oat, corn and soybean were studied. No tillage straw mulching combined with different crop rotation can regulate soil water and heat environment. Soil water storage in different treatments showed that no tillage with high stubble mulching (NLSs) no-tillage with low stubble mulch (no tillage with high stubble and low stubble with NLL) with no tillage with low stubble (NLL) with conventional tillage and three rotation cropping methods of oat were used. NHSN NLSN NH N N N + N N N. The no-tillage mulch can increase the soil temperature by 1.4 ~ 2.4 鈩，

本文編號(hào)：1639044