本文關(guān)鍵詞： 香樟 凋落葉分解 抗性生理 氮組分 化感作用　出處：《南京林業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期 　論文類型：期刊論文

【摘要】：【目的】探討香樟(Cinnamomum camphora)凋落葉添加到土壤中對小白菜(Brassica chinensis)、萵筍(Lactuca sativa)、茄子(Solanum melongena)生長和抗性生理的影響以及土壤礦質(zhì)化氮的動(dòng)態(tài)響應(yīng)�！痉椒ā坎捎门柙栽囼�(yàn),以單位面積香樟葉年凋落量作為凋落葉的基本添加量,設(shè)不添加凋落葉的對照(CK)和3個(gè)凋落葉添加水平,即A_1(25 g/盆)、A_2(50 g/盆)、A_3(100 g/盆),每處理重復(fù)5次,處理3種作物共計(jì)60盆。處理后,定期對植株生長指標(biāo)(株高、地徑)和抗性生理指標(biāo)(超氧化物歧化酶、過氧化氫酶、過氧化物酶)和作物所生長土壤的硝態(tài)氮、銨態(tài)氮含量進(jìn)行測定�！窘Y(jié)果】香樟凋落葉分解對3種作物的地徑、株高均有明顯的抑制作用,且有隨凋落葉添加量的增加而增強(qiáng)并隨分解時(shí)間的延長而逐漸減弱的效應(yīng);香樟凋落葉分解初期(20~40 d),各水平處理均顯著地促進(jìn)了葉片超氧化物歧化酶(SOD)和過氧化氫酶(CAT)活性,抑制了過氧化物酶(POD)活性。凋落葉分解到80 d時(shí),各處理CAT、POD、SOD活性的差異明顯縮小;加入不同量的香樟凋落葉在一定時(shí)間(30~50 d)內(nèi)大幅降低了土壤礦化氮(硝態(tài)氮和銨態(tài)氮)含量;不同作物對香樟凋落葉化感作用的敏感程度不同,萵筍最為敏感,其次是小白菜,茄子的耐受性最強(qiáng),相對更適宜在香樟林間或林緣種植�！窘Y(jié)論】香樟凋落葉分解可能降低了土壤氮素的有效性,并對作物造成活性氧傷害,最終限制其生長發(fā)育。
[Abstract]:[objective] to study the effect of Cinnamomum camphora (Cinnamomum camphora) on Brassica chinensis (Brassica chinensis). Lactuca sativa. Effects of Solanum melongena on growth and resistance physiology and dynamic response of soil mineralized nitrogen. [methods] pot experiment was carried out. The annual litter amount per unit area of Cinnamomum camphora was taken as the basic addition amount of littered leaves, CK) and 3 littered leaf supplementation levels were set up, namely, A1m25 g / pot). The annual litter amount of Cinnamomum camphora L. per unit area was used as the basic addition amount of littered leaves. Each treatment was repeated five times, and the three crops were treated in 60 basins. After treatment, the plant growth index (plant height) was regularly analyzed. Ground diameter), resistance physiological indexes (superoxide dismutase, catalase, peroxidase) and nitrate nitrogen in soil grown by crops. [results] decomposition of littered leaves of Cinnamomum camphora had a significant inhibitory effect on ground diameter and plant height of three crops. The effect was increased with the increase of leaf litter addition and weakened with the prolongation of decomposition time. The activity of superoxide dismutase (SOD) and catalase catalase (CAT) in leaves of Cinnamomum camphora L. The activity of peroxidase POD) was inhibited. The difference of SOD activity between different treatments decreased obviously when the leaves were decomposed to 80 days. The content of soil mineralized nitrogen (nitrate nitrogen and ammonium nitrogen) was significantly decreased by adding different amount of camphora camphora leaves in a certain period of 30 ~ 50 days. The sensitivity of different crops to the allelopathy of Cinnamomum camphora was different. Lettuce was the most sensitive, followed by pakchoi, and eggplant had the strongest tolerance. Conclusion the decomposition of littered leaves of Cinnamomum camphora may reduce the availability of soil nitrogen and cause damage to crops by reactive oxygen species, and ultimately limit the growth and development of Cinnamomum camphora.
【作者單位】： 四川農(nóng)業(yè)大學(xué)林學(xué)院;內(nèi)江市農(nóng)業(yè)科學(xué)院;瀘州市林業(yè)科學(xué)研究所;
【基金】：“十二五”國家科技支撐計(jì)劃(2011BAC09B05) 四川省教育廳重點(diǎn)項(xiàng)目(13ZA0246)
【分類號(hào)】：S63;S714
【正文快照】： peroxidase(POD)was increased.After 80 d of decomposition,the activity difference of CAT,SOD and POD were significant-ly decreased.Different addition during a certain period(30-50 d)remarkably reduced the content of soil mineral nitrogen(nitrate nitrogen ，

本文編號(hào)：1461331