论文标题:氮磷钾硅不同营养对草坪草的生长和抗逆性的影响
Effect of Nitrogen, Phosphor, Potassium and Silicon on Growth and Resistance in Turfgrass
论文作者 叶艳丽
论文导师 王运华,论文学位 硕士,论文专业 植物营养学
论文单位 华中农业大学,点击次数 152,论文页数 51页File Size2864k
2004-05-01论文网 http://www.lw23.com/lunwen_21538637/ 养分,叶绿素,丙二醛,脯氨酸,叶相对含水量,蒸散量
nutrient content, dry weight chlorophyll, MDA, Proline
采用砂培的试验方法，研究了氮磷钟不同营养水平、氮磷钾不同配比对黑麦草养分、干物重、叶绿素、丙二醛和脯氨酸含量的影响，从而初步确定了最适宜黑麦草生长的氮磷钾水平；本试验还研究了硅营养增强狗牙根、黑麦草和剪股颖抗旱性的初步机制，所得主要结果如下： 1．当施氮水平为N4(168mg／kg)时，与N1相比，提高了黑麦草于物质积累量48.5％，叶绿素含量67.9％，脯氨酸含量9.6％，降低了丙二醛含量32.7％；而施氮量低于或高于N4时，都降低了黑麦草生长量、积累量、颜色及抗逆性。初步认为，最适宜黑麦草生长的氮水平是N4。 2．不同磷营养水平对黑麦草的养分含量和积累量、干物重、抗逆性有着显著性影响，但对黑麦草的叶绿素含量没有显著的影响；当施磷水平高于P3时，增加施磷量有增加黑麦草的干物质积累、脯氨酸的含量的趋势，但不显著；当施磷水平为P4时，丙二醛的含量最低，与P1相比，降低了35.3％，但当施磷量高于P4时，增加施磷量不但没有降低丙二醛含量，反而有增加黑麦草丙二醛含量的趋势。初步确定施磷水平为P4时就可以得到生长较好的黑麦草。 3．不同钾营养水平对黑麦草的养分含量和积累量、抗逆性有着显著性影响，但对黑麦草的干物质积累和叶绿素含量没有显著的影响。当施钾水平为K3、K4、K5、K6时，与K1相比，脯氨酸含量分别增加了46.1％、63.1％、92.3％、216.8％，但K3、K4、K5间差异不显著；当施钾水平为K4时，丙二醛含量降到最低，与K1相比，降低了23.8％，当施钾水平小于或大于K4时，丙二醛的含量都高于K4。初步确定施磷水平为K4时就可以得到生长较好的黑麦草。 4．氮磷钾不同配比显著提高了黑麦草的干物质积累量、叶绿素和脯氨酸的含量，降低了丙二醛含量。其中处理N_2P_1K_1和N_2P_1K_1的效果最好，与N_0P_0K_0相比，处理N_1P_1K_1的干物质积累量、叶绿素和脯氨酸的含量分别增加了164.3％、77.5％、340.7％，丙二醛含量降低了18.1％；处理N_2P_1K_1的干物质积累量、叶绿素和脯氨酸的含量分别增加了142.9％、85.9％、798.1％，丙二醛含量降低了31.7％。但从经济的角度来讲，处理N_1P_1K_1比处理N_2P_1K_1更适用。 5．施硅增加了草坪草狗牙根、剪股颖和黑麦草的含硅量，分别为209％、295％、285％；积累量分别提高了240％、364％、355％；施硅对草坪草狗牙根、剪股颖和黑麦草的干物质积累有促进趋势；在干旱的条件下，施硅抑制了草坪草的叶相对含水量的降低，延迟了叶片萎焉的时间，在干旱胁华中农业大学2001级时一艳丽硕士学位论文迫第n天，与正CK相比，施硅后狗牙根、剪股颖和黑麦草分别只降低了14%;16%，32%。;施硅增加了狗牙根、剪股颖、黑麦草在干旱条件下脯氨酸的含量，增强了渗透调节能力，在干旱施硅的条件下，与正51相比，在干旱胁迫第11天，狗牙根、剪股颖和黑麦草脯氨酸的含量分别增加了2叨%、199%、473%;施硅减少了狗牙根和黑麦草的蒸散量在正常浇水的条件下，与正CK相比，第11天狗牙根和黑麦草的蒸散量分别降低了21%、吕%;在干旱的条件下，与干CK相比，在干旱胁迫的第11天，狗牙根和黑麦草的蒸散量分别降低了17%、5%。可见，硅的施用可增强狗牙根、剪股颖和黑麦草的抗旱性，有利于节约水资源。
Adopt the test method of growth on sand, have studied the effect of different nutrition levels of nitrogen, Phosphorus, potassium and different matching of nitrogen, phosphorus, potassium on nutrient content ,dry weight , chlorophyll ,MDA ,Pro content in Lolium. Pereme , Thus confirmed levels of nitrogen, Phosphorus, potassium that is most suitable for the growth of Lolium. Pereme ; also to test the preliminary mechanism of drought-resistance of silicon nutrition on turfgrass. the main result of the income is as follows:1. When the nitrogen level is N4(168mg/kg) , compared with N1 , increasing the accumulating amount of material 48% , chlorophyll content 68% ,Pro content 9% ,and depressing MDA content 32% of Lolium. Pereme, But the level of nitrogen is low or higher than N4, all reduce the growth, accumulating amount , color and resistance of Lolium. Pereme. Thinking tentatively , it is N4 to be most suitable for the growth of Lolium. Pereme.2. Different phosphorus levels have significance influence on nutrient content ,dry weight , risistance of Lolium. Pereme , but does not have remarkable influence on the content of chlorophyll of Lolium. Pereme.When phosphorus level is higher than P3 increasing phosphorus level have trend to rising dry weight and Pro content ,but not significance. When phosphorus level is P4 , MDA content is lowest , compared with Pl,depressing 35% ; when the level is higher than P4 increasing amount of phosphorus not depress the content of MDA but have a trend to rise the content. Thinking tentatively , it is P4 to be most suitable for the growth of Lolium. Pereme.3. Different potassium levels have significance influence on nutrient content , accumulating amount , risistance of Lolium. Pereme , but does not have remarkable influence on the content of chlorophyll and dry weight of Lolium. Pereme.When potassium level is K3 ,K4 ,K5 ,K6 ,compard with Kl , the content of Pro separately increased 46% ,63% ,92% ,217% ,but have not differed significantly in K3 ,K4 ,K5 ; When potassium level is K4 , MDA content is lowest , compared with Kl,depressing 24% ; when the level is low or higher than P4 ,the content of MDA are higher than K4 , Thinking tentatively , it is K4 to be most suitable for the growth of Lolium. Pereme.4. Different matching of nitrogen, phosphorus, potassium significantly increased dryweight, the content of chlorophyll ,Pro , depressed the content of MDA. The treatment N2P1K1 is best ,compared with N0P0K0 , the content of chlorophyll ,Pro and dry weight separately increased 86% ,798% ,143% ,the content of MDA depressed 32% . 5. The use of silicon increased the silicon content of bermudagrass ,agrostis Lolium. Pereme , separately are 209% ,295% ,285% ; the increasing of accumulating amount separately are 209% ,295% ,285%; The use of silicon has a tread to rise dry weight of Bermudagrass ,Agrostis Lolium. Pereme ; Under the drought condition , the use of silicon suppressed the reducing of the relative water content of leaf in turfgrass , delaying the time of wither , stress for the 11th day in the drought .compared with water normally and not using silicon ,after use silicon, the RWC of Bermudagrass , Agrostis Lolium. Pereme only separately depressed 14% ,16% ,32%; Under the drought condition ,the use of silicon can increased the content of proline of Bermudagrass ,Agrostis Lolium. Pereme, stress for the 11th day in the drought and using silicon , compared with water normally and ueing silicon, the content of Pro separately increased 203% ,199% ,473% ;The using of silicon depressing the ET of Bermudagrass and Lolium. Pereme.Under water normally condition, separately depressed 21% ,8% at eleven days ;Under drought condition , separately depressed 17% ,5% . It is obvious to see using silicon can strengthen drought- resistance of Bermudagrass ,Agrostis Lolium. Pereme, It is help to economize the water resource
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