【正文】 氮肥源，尿素（分析純）為磷肥源，氯化鉀（分析純）為鉀肥源。我們通過實(shí)驗(yàn)組與對(duì)照組數(shù)據(jù)的對(duì)比分析，找出數(shù)據(jù)之間的聯(lián)系以及變化規(guī)律，來探究低磷脅迫如何影響作物生物量指標(biāo)。植物的營養(yǎng)特性研究方法比較局限，各有優(yōu)劣，并不是所有常用的試驗(yàn)方法都能得到研究者的青睞。磷高效基因型分為兩種。具體表現(xiàn)有兩方面：（ 1）根干物質(zhì)積累量的增加；（ 2）根總表面積的增加。低磷環(huán)境下植物要想使磷素的有效吸收達(dá)到最大化，增加根系在有效磷含量豐富區(qū)域的分 布數(shù)量是一種可能的解決方法。碳水化合物代謝受阻，玉米各個(gè)器官組織形成花青素的難度變小，以后在莖葉會(huì)呈現(xiàn)出紫紅色，葉尖、葉緣也有該現(xiàn)象發(fā)生，尤其是葉尖，在其干枯老去時(shí)甚至?xí)勺霞t色轉(zhuǎn)變成為暗紫褐色。但是，在研究不斷深入的同時(shí)，隨之而來的還有種植成本的花費(fèi)日益提高，這不能從根本上解決土壤缺磷的問題。 關(guān)鍵詞 ： 甜 糯玉米；低磷脅迫 ；生物量摘 要 II ABSTRACT Phosphorus is the second nitrogen affect plant growth and development of the second major element, accounting for % of the dry weight of % in the plant. [1] Large individual plants to plant growth and development, small cell metabolism are closely linked with phosphorus. Adequate supply of phosphorus has bee the key to the normal growth of plants. The phosphorus supply will produce farreaching negative effects on plants, their growth will therefore be severely suppressed. [2] This study is to control the amount of phosphorus fertilizer application at the same processing lower than normal growth of plants needed for the nieen varieties of sweet root dry when heavy waxy maize seedling crown dry weight, height, stem diameter, biomass difference root volume, the number and other research. This study can help people of Sweet Glutinous Corn planting targeted fertilization, it is conducive to achieve the desired growth of the state and growth indicators. This phenomenon has great phosphorus stress can explore and practicality. KEYWORDS: Sweet and waxy corn。20xx 屆本科生畢業(yè)論文 低磷脅迫對(duì)不同甜糯玉米品種苗期生物量的研究 Study on Biomass in Different Sweet and Waxy Corn Seedling Stage under Low Phosphorus Stress 學(xué)生姓名 陳應(yīng)標(biāo) 學(xué)號(hào) 20xx11311102 所在學(xué)院 農(nóng)學(xué)院 班級(jí) 農(nóng)資 1111 班 所在專業(yè) 農(nóng)業(yè)資源與環(huán)境 申請(qǐng)學(xué)位 農(nóng)學(xué) 學(xué)士學(xué)位 指導(dǎo)教師 郭榮發(fā) 職稱 教授 副指導(dǎo)教師 職稱 答辯時(shí)間 20xx年 5月 30 日 目 錄 摘 要 .................................................................................................................................... I ABSTRACT ..........................................................................................................................II 1 前言 .............................................................................................................................. 3 概論 ......................................................................................................................... 3 低磷脅迫下玉米的缺素癥狀表現(xiàn)研究 ................................................................. 3 湛江土壤特性 ......................................................................................................... 4 低磷脅迫 生物量的研究進(jìn)展 ................................................................................. 4 研究目的與意義 ..................................................................................................... 5 2 實(shí)驗(yàn)材料與方法 .......................................................................................................... 5 實(shí)驗(yàn)材料 ...................................................................................................................... 5 實(shí)驗(yàn)設(shè)計(jì) ...................................................................................................................... 6 準(zhǔn)備工作 ............................................................................................................... 6 實(shí)驗(yàn)步驟 ............................................................................................................... 7 測(cè)定項(xiàng)目與方法 .......................................................................................................... 7 數(shù)據(jù)分析方法 .............................................................................................................. 8 3 結(jié)果與分析 .................................................................................................................. 8 低磷條件下對(duì)甜糯玉米苗期株高的影響 .................................................................. 8