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1、hm例追肥，追氮量为120kg/hm2处理下，玉米籽粒产量最高达12405.29kg/hm2, 分别显著高于 T3 条件下 30 kg/hm2、60 kg/hm2、90 kg/hm2、150 kg/hm2、覆膜传 统施肥对照处理和覆膜不施肥处理29.5%、12.3%、7.8%、4.9%、13.3%和64.6% ； 高于同一施肥量下（T2）叶龄指数30%、叶龄指数60%两个时期等比例施肥和 （T5）叶龄指数30%、叶龄指数45%、叶龄指数60%、叶龄指数100%、抽雄吐 丝后15天，五个时期等比例追肥条件9%和7.3%。氮素吸收量表现为在T3条件 下施氮量为150 kg/hm2时达最大值，达到2
2、41.82 kg/hm2，分别比高T2N150和 T5N150高3.8%和 1.6%，分别比T3条件下各施氮量处理高0.6%37%。玉米SPAD值、干物质积累，植株氮素积累与分配、氮肥利用率、氮肥农学 效率、每吨籽粒氮素吸收量、可溶性糖含量、淀粉含量、及蛋白质含量等大部分 指标均随着施氮量的增加而持续增加，但当氮肥超过120kg/hm2，各指标增加不 明显，甚至一些指标发生不同程度下降趋势。拔节后45天（45 DAJS），T3N120 处理叶面积指数达到6.53，显著高于同一时期T3N30-T3N90施氮处理7.6% 29%；同时T3N120显著高于同一时期T2N120处理8.5% （P0.0
3、5），与T5N120 处理差异不显著。在45DAJS时期，T3N120处理玉米叶片SPAD值达到各时期 和各施肥量最大，达到63.33,分别比同一时期同一施肥次数下的T3N30、T3N60、 T3N90、T3N150、CK1、CK2 施肥量处理高 15.29%、7.94%、4.45%、4.73%、 26.08%、26.84%；相对于同一时期同一施氮量处理的T2和T5施肥处理高6.62%、 11.44%。T3N120处理的干物质产量达到最大值407.12g/plant，分别比同一时期 T3N30、T3N60、T3N90、T3N150、CK1、CK2 高 64.49、42.82、24.96、11.
4、24、 80.44、151.32g/plant，相比于 T2N120、T5N120 处理高 5.15、48.79 g/plant。在 T3N120处理条件下的可溶性糖含量相对于同一施肥次数下其他施氮处理高 5.03%43.09%。成熟期玉米籽粒中的淀粉含量均在N30时达到最大，T2N30达 到84.23%，其中在T3N120条件下的籽粒蛋白质含量达11.84%，相对AbstractThis test is based on drip irrigation under mulch fertilization conditions, the number of different fertiliz
5、ation Songnen Plain nitrogen and western influence on maize yield formation in order to provide a theoretical basis for improving the Songnen Plain, the western corn yield cultivation techniques.The main results are as follows:Test two-factor split plot design, the main area is the number of Nitroge
6、n, Nitrogen subplot is repeated three times. Nitrogen times including twice (T2,30% + 60% leaf index period), three times (T3,30% + 60% + 100% leaf index period), 5 (T5,30% + 45% + 60% + 100% + 15 d period leaf index after silking) proportional fertilization; Nitrogen comprises 30 (N30), 60 (N60), 9
7、0 (N90), 120 (N120) and 150 (N150) kg/hm2, a total of five levels of nitrogen application to traditional fertilization 1 (CK1) and no fertilization, (CK2) as a control, a total of 17 treatment, all treatments with 3 replicates, except CK2, all treatments were applied to base fertilizer N60 kg/hm2, P
8、2O5 90 kg/hm2 and K2O 120 kg/hm2. Effect of different fertilizer amount and frequency of application research on corn yield and nitrogen accumulationThe results show that: in (T3) leaf index 30%, 60% of the index leaf, three leaf index 100% proportional fertilizer, nitrogen application of 120kg/hm2
9、Handling, grain yield up 12405.29kg/hm2, respectively, significantly higher than T3 condition 30 kg/hm2,60 kg / hm2,90 kg/hm2,150 kg/hm2, the traditional film processing and fertilizer control fertilization treatments not covered 29.5%, 12.3%, 7.8%, 4.9%, 13.3% and 64.6%; higher than the same amount
10、 of fertilizer under (T2) leaf index of 30%, the proportion of leaf index of 60% in both periods and other fertilization and (T5) leaf index 30%, leaf index 45%, 60% of the index leaf, leaf index of 100%, 15 days after the seeding stage, five times the proportion of fertilizer and other conditions o
11、f 9% and 7.3%. Nitrogen absorption performance under conditions T3 nitrogen rate 150kg/hm2 and up to a maximum value reached 241.82 kg/hm 2, respectively, and the ratio T2N150 and T5N150 3.8% and 1.6%, respectively, over all N at T3 condition handle high volume from 0.6% to 37%. Among The grain nitr
12、ogen uptake at T3 condition 150kg/hm2 nitrogen chase maximum capacity, accounting for 53.15% of the total nitrogen uptake of maize was significantly (P 0.05) higher than other organs.With corn growth periods of advance, within a certain range of fertilization (0120kg/hm2), grain yield, leaf area ind
13、ex, SPAD value, dry matter accumulation, accumulation and distribution of plant nitrogen, nitrogen use efficiency, nitrogen agronomic efficiency, per ton of grain nitrogen uptake, soluble sugar content, starch content and protein content with increasing amount of nitrogen continued to increase, but
14、more than a certain amount of nitrogen (120kg/hm 2), the index increase was not obvious, even Some decline in indicators of varying degrees of trend. 45 days (45DAJS) after jointing, T3N120 treated leaf area index reached 6.53, significantly higher than the same period T3N30 T3N90 N treatments 7.6%
15、to 29%; while T3N120 significantly higher than the same period T2N120 processing 8.5% (P 0.05) with T5N120 treatments were not significant. In 45DAJS period, T3N120 corn processing SPAD value each period and reach the largest amount of each fertilizer, to 63.33, respectively, compared with the same
16、period T3N30 same frequency and fertilization under, T3N60, T3N90, T3N150, CK1, CK2 fertilization treatment of high 15.29%, 7.94 %, 4.45%, 4.73%, 26.08%, 26.84%; T2 and T5 with respect to the same nitrogen fertilization in the same period the amount of processing 6.62% higher, 11.44%. Dry matter yield T3N120 process reaches the maximum 407.12g/plant, respectively, compared with the same period T3N30, T3N60, T3N90, T3N150, CK1, CK2 high 64.49, 42.82, 24.96, 11.24, 80.44, 15
