【摘要】：針對(duì)江西旱地紅壤肥力低下、生產(chǎn)力不高等突出問題,基于長(zhǎng)期野外旱地紅壤定位試驗(yàn),研究了改良劑(生物質(zhì)炭和過氧化鈣)對(duì)旱地紅壤活性有機(jī)碳及與碳代謝相關(guān)酶活性的影響。試驗(yàn)設(shè)置生物質(zhì)炭施用量0(C0)、758(C1)、1 515(C2)kg/hm2和過氧化鈣施用量0(Ca0)、61(Ca1)、121(Ca2)kg/hm2,生物質(zhì)炭和過氧化鈣單施和配施共9個(gè)處理,即CK、C0Ca1、C0Ca2、C1Ca0、C1Ca1、C1Ca2、C2Ca0、C2Ca1、C2Ca2。結(jié)果表明,生物質(zhì)炭單施和配施均在一定程度上提高了旱地紅壤有機(jī)碳及活性碳組分,且效果優(yōu)于單施過氧化鈣。C2Ca0、C2Ca1和C2Ca2處理土壤有機(jī)碳增加較顯著。生物質(zhì)炭和過氧化鈣顯著提高土壤活性有機(jī)碳組分,與對(duì)照(CK)相比,其中C1Ca0處理的微生物生物量碳平均增加了45.22%,C1Ca2處理的可溶性有機(jī)碳平均增加了21.34%,C1Ca0處理的顆粒有機(jī)碳平均增加了20.72%,C2Ca2處理的易氧化有機(jī)碳平均增加了22.19%。生物質(zhì)炭和過氧化鈣對(duì)提高碳庫管理指數(shù)均有較好的效果,0~10 cm和10~20 cm土層分別平均增加了11.09%、14.07%。添加生物質(zhì)炭對(duì)旱地紅壤酶活性均有促進(jìn)作用,且對(duì)0~10 cm土層土壤酶的影響較10~20 cm土層明顯;配施C2Ca2明顯提高旱地紅壤淀粉酶、纖維素酶和β-葡糖苷酶活性,C1Ca1明顯提高紅壤蔗糖酶活性。因此,生物質(zhì)炭和過氧化鈣能有效改善旱地紅壤活性有機(jī)碳組分以及與碳代謝相關(guān)酶活性,且生物質(zhì)炭與過氧化鈣配合施用對(duì)土壤改良的效果更好。
[Abstract]:In view of the outstanding problems of low fertility and low productivity in Jiangxi upland red soil, based on the long-term field experiment of the upland red soil, The effects of modifiers (biomass carbon and calcium peroxide) on active organic carbon and enzymes related to carbon metabolism in upland red soil were studied. The experiment set up 9 treatments of biomass carbon 0 (C0) 758 (C1) 1 515 (C2) kg/hm2 and calcium peroxide 0 (Ca0) 1 (Ca1) 1 1 (Ca2) kg/hm2, that is CK,C0Ca1,C0Ca2,C1Ca0,C1Ca1,C1Ca2,C2Ca0,C2Ca1,C2Ca2.. The results showed that the organic carbon and active carbon components of upland red soil were increased to some extent by single and combined application of biomass carbon, and the effect was better than that of calcium peroxide. C2Ca0, C2Ca1 and C2Ca2 treatments, and the increase of soil organic carbon was more significant than that of single application of calcium peroxide, C2Ca0, C2Ca1 and C2Ca2. Biomass carbon and calcium peroxide significantly increased soil active organic carbon components, compared with the control (CK). The microbial biomass carbon of C1Ca0 treatment increased by 45.22% and the soluble organic carbon of C _ 1 Ca _ 2 treatment increased by 21.34% C _ (1) Ca _ (0) on average, the particulate organic carbon of C _ (1) Ca _ (0) treatment increased by 20.72% C _ (2) Ca ~ (2 +) and the easily oxidized organic carbon of C _ (2) Ca _ (2) treatment increased 22.19%. Biomass carbon and calcium peroxide had a good effect on improving the carbon pool management index. The soil layers of 10 cm and 10 ~ 20 cm were increased by 11.09 ~ 14.07 and 11.09 ~ 14.07, respectively. The enzyme activity of red soil was promoted by adding biomass carbon, and the effect of adding biomass carbon on enzyme activity in 0 ~ 10 cm soil layer was more obvious than that in 10 ~ 20 cm soil layer, and the amylase activity in upland red soil was obviously increased by adding C2Ca2. Cellulase and 尾-glucosidase activity C _ 1Ca _ 1 significantly increased sucrase activity in red soil. Therefore, biomass carbon and calcium peroxide can effectively improve the activity of active organic carbon components and enzymes related to carbon metabolism in upland red soil, and the combination of biomass carbon and calcium peroxide can improve the soil better.
【作者單位】： 江西省紅壤研究所;南昌工程學(xué)院江西省退化生態(tài)系統(tǒng)修復(fù)與流域生態(tài)水文重點(diǎn)實(shí)驗(yàn)室;土壤與農(nóng)業(yè)可持續(xù)發(fā)展國家重點(diǎn)實(shí)驗(yàn)室(中國科學(xué)院南京土壤研究所);
【基金】：江西省教育廳科研技術(shù)研究項(xiàng)目(GJJ161100) 國家自然科學(xué)基金項(xiàng)目(41461050,41661065,31760167) 2014年高校大學(xué)生創(chuàng)新創(chuàng)業(yè)教育計(jì)劃專項(xiàng) 江西省2015年度研究生創(chuàng)新專項(xiàng)資金項(xiàng)目(YC2015-S416)資助
【分類號(hào)】：S156.6

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