本文關(guān)鍵詞：生物炭改良劑對小白菜生長及低質(zhì)土壤氮磷利用的影響，由筆耕文化傳播整理發(fā)布。
李冬,陳蕾,夏陽,宋曉娜,劉旻慧,鄭浩.生物炭改良劑對小白菜生長及低質(zhì)土壤氮磷利用的影響[J].環(huán)境科學(xué)學(xué)報(bào),2014,34(9):2384-2391
生物炭改良劑對小白菜生長及低質(zhì)土壤氮磷利用的影響
The effects of biochar on growth and uptake of nitrogen and phosphorus for Chinese cabbage in poor quality soil in Ningxia
關(guān)鍵詞：生物炭 小白菜 產(chǎn)量 土壤養(yǎng)分 根際 養(yǎng)分利用有效性
基金項(xiàng)目：中國博士后基金（No.2014M550374）；寧夏回族自治區(qū)科技支撐計(jì)劃項(xiàng)目（No.2013Zys149）；寧夏農(nóng)林科學(xué)院自主研發(fā)項(xiàng)目（No.nkyg-13-11）
作者單位
摘要：生物炭技術(shù)是近年來新興的具有多重農(nóng)業(yè)和環(huán)境效益的土壤改良技術(shù).本研究以寧夏低質(zhì)淡灰鈣土為研究對象，以“中白78”小白菜（Brassica chinensis）為供試作物，分別按0、1.5%、3%和5%（質(zhì)量分?jǐn)?shù)）的比例添加花生殼生物炭（Biochar，BC）和基于花生殼生物炭研發(fā)的生物炭改良劑（BC-based amendment，AD），系統(tǒng)研究了BC和AD對小白菜植株生長、產(chǎn)量及土壤養(yǎng)分利用有效性的影響.結(jié)果表明：BC和AD的添加均增加了小白菜的株高和產(chǎn)量，與BC相比，AD對小白菜的增產(chǎn)效果更為顯著（BC和AD處理的產(chǎn)量分別為對照的2.34~3.77倍和4.37~4.60倍）.各劑量BC處理中，小白菜地上部、根系生物量的順序?yàn)?.5%BC>3%BC≈5% BC；而對于AD處理，，3種添加量處理的小白菜生物量無顯著性差異.增產(chǎn)的主要原因包括兩方面：第一是兩種材料中主要養(yǎng)分對小白菜生長的直接貢獻(xiàn)；第二則是兩種材料均促進(jìn)了小白菜根系的生長，增強(qiáng)了根際效應(yīng)，從而改變了N、P等土壤養(yǎng)分的利用有效性.BC和AD的加入均增加了小白菜對N的利用有效性，AD促進(jìn)了小白菜對P的利用有效性.可見，BC和AD均可作為土壤改良劑，改善寧夏低質(zhì)淡灰鈣土的養(yǎng)分狀況，提高作物產(chǎn)量.
Abstract：The biochar technology has become a promising technology for soil amelioration due to its multiple agricultural and environmental benefits. Biochar sample (BC) and BC-based amendment was developed, and added into the poor quality soil (light Sierozem) collected from Ningxia Hui Autonomous Region with the rates of 0、1.5%、3% and 5%, respectively. Chinese cabbage Zhongbai 78 (Brassica chinensis) was chosen as the test plant, and the effect of BC and AD on its growth, yield and nitrogen (N) and phosphorus (P) utilization efficiency was investigated, as well as rhizosphere effect. The results indicated that the cabbage height and yield significantly increased in BC and AD treatmens, and more significant in AD treatment compared with that of BC. These positive effects is possibly due to the direct nutrient contributions from BC and AD, as well as the enhanced rhizosphere effect resulted from adding of BC and AD. The N utilization efficiency was enhanced in both BC and AD treatments, but P utilization efficiency was enhanced only in AD treatments. Therefore, BC and AD may be used as the poor quality soil amendments to improve nutrient utilization efficiency and thus to increase crop yield.
Key words：biochar Chinese cabbage yield soil nutrient rhizosphere nutrient utilization efficiency
摘要點(diǎn)擊次數(shù)： 852 全文下載次數(shù)： 907
本文關(guān)鍵詞：生物炭改良劑對小白菜生長及低質(zhì)土壤氮磷利用的影響，由筆耕文化傳播整理發(fā)布。
本文編號：
122203
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