Effects of Nitrogen-reducing Fertilization and Pruning on Growth, Yield, and Fruit Quality of Passion Fruit Vine
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摘要:
目的 研究减氮施肥措施并结合修剪处理对百香果生长、开花和结果以及单株产量与果实品质的影响,为合理使用氮肥并明确减氮施肥下选择适宜百香果枝蔓修剪的栽培措施提供技术支撑。 方法 以百香果品种台农1号为材料,2021—2022年在百香果大田采用单级结果蔓栽培模式,以100%氮肥施用量(240 kg·hm−2)和不修剪措施组合为对照(T1、CK),研究9种不同氮肥施用量和修剪强度措施组合(T1–T9)处理百香果定植苗,测定并分析了百香果结果蔓生长及单株产量与品质相关指标。 结果 合理减氮施肥和修剪措施组合能促进百香果结果蔓生长、开花和结果,增加单株产量,提高果实品质。与T1(CK)相比,80%氮肥施用量结合强修剪措施(T6)可使植株茎粗度、有效叶片数、花蕾数、开花数、坐果数、成花率和坐果率等7项指标值均显著增加,且均达到最高水平,同时使百香果结果蔓平均节间长度显著缩短了19.04%;减氮施肥结合修剪处理的百香果单株产量在2个试验年份均值较对照(CK)各表现显著差异(P<0.05),其中T6处理百香果单株产量显著提高了71.74%,达到最高值, 且单株结果数、平均单果重和中大果比率均达到最大,分别提高了48.90%、15.29%和1.65%,总糖含量和糖酸比值分别增加了25.89%和75.24%,酸含量降低了28.18%。 结论 百香果生产中,施用80%氮肥量,即氮施用量减少至192 kg·hm−2时,并采用定植苗生长枝条强修剪措施,可增加单株产量,并使百香果植株生长、开花和结果及品质达到最佳效果。 Abstract:Objective Effects of N-reducing fertilization combined with vine pruning on the growth, yield, and fruit quality of passion fruit plants were studied. Method A field test was conducted in two consecutive years on Tainong No. 1 passion fruit with the single-fruiting vine cultivation method under different N-reducing fertilizations in combination with varied pruning methods. Effects of regular N application at 240 kg·hm−2 without pruning as control (T1) and 9 treatments using varied N-reducing fertilizations and vine pruning on the plant growth and fruit formation, yield, and quality were determined. Result From 2021 to 2022, the stem diameter and the numbers of effective leaves, floral buds, flowers, and successfully formed fruits were increased by the treatments. The use of 80% of the normally applied N fertilizer with pruning, T6 significantly improved those indices to the highest level among all treatments and control and shortened the average internode between fruits by 19.04%. The treatments significantly changed the average fruit yield per plant over control (P<0.05) with the greatest increase of 71.74% delivered by T6. T6 also produced the highest number of fruits per vine, average individual fruit weight, and proportion of medium and large fruits with the increases of 48.90%, 15.29%, and 1.65%, respectively. And the fruits the vines bore were 25.89% higher on total sugars, 75.24% higher on sugar-acid ratio, and 28.18% lower on acid than they were under T1. Conclusion The 20% reduction on the use of N fertilizer (i.e., at the application rate of 192 kg·hm−2) along with severe branch pruning on a passion fruit vine could significantly improve the plant growth, flowering, and fruiting as well as the fruit yield and quality. -
Key words:
- Nitrogen fertilizer reduction /
- pruning /
- passion fruit /
- vine /
- yield per plant
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表 1 不同处理对百香果结果蔓生长、开花和结果指标的影响
Table 1. Effects of treatments on growth, flowering, and fruiting indices of passion fruits
处理
Treatment茎粗
Stem diameter
/mm有效叶片数
Productive leaves/叶平均节间长度
Mean panel
length/cm花蕾数
Flower buds
number/个开花数
Flowers number/朵成花率
Rate of
flowering/%坐果数
Fruit setting
number/个坐果率
Fruit setting
rate/%T1(CK) 10.70±0.615 d 29.05±0.565 f 12.83±0.558 a 29.48±0.748 c 26.23±0.647 c 89.03±2.983 d 20.65±0.659 e 78.75±2.954 f T2 11.96±0.593 c 32.27±0.899 c 12.30±0.477 b 30.83±0.693 a 27.52±0.792 d 89.28±3.129 d 22.88±0.825 d 83.22±3.564 d T3 14.06±0.540 a 35.40±0.616 b 11.36±0.447 c 30.88±0.490 a 28.23±0.851 c 91.45±3.274 c 25.03±0.486 c 88.76±3.498 c T4 10.85±0.463 d 32.27±0.710 c 12.27±0.576 b 30.87±0.536 a 26.07±0.578 c 84.46±1.754 e 20.78±0.555 e 79.76±2.406 ef T5 12.18±0.545 b 35.52±0.792 b 11.21±0.494 c 31.00±0.451 a 28.72±0.691 b 92.64±2.107 b 26.60±1.464 b 92.68±5.392 b T6 14.21±0.456 a 38.37±0.823 a 10.39±0.611 d 30.98±0.596 a 30.20±0.659 a 97.50±2.563 a 28.52±0.725 a 94.45±2.416 a T7 8.77±0.480 f 29.10±0.573 f 9.30±0.570 d 30.35±0.732 b 19.58±0.619 f 64.57±2.660 g 15.80±0.605 g 80.78±4.373 e T8 9.80±0.512 e 31.27±0.634 e 8.27±0.469 e 30.48±0.813 b 19.88±0.524 e 65.27±2.360 g 15.95±0.769 g 80.27±4.272 e T9 10.70±0.486 d 31.73±0.821 d 7.17±0.520 f 30.83±0.693 a 21.88±0.524 d 71.02±2.622 f 17.92±0.696 f 81.92±3.708 d 表中均为2021–2022年度指标平均值,同列数据后不同小写字母表示在5%水平上存在差异性显著(P<0.05)。下同。
Data are averaged indicators obtained from 2021 to 2022; those with different lowercase letters on same column indicate significant differences at 5% level. Same for the following.表 2 不同处理对百香果单株产量及其构成相关指标的影响
Table 2. Effects of treatments on yield per plant and related indices of passion fruits
处理
Treatment单株产量
Yield per plant/kg单株结果数
Fruit number/个平均单果重
Weight of per fruit/g中大果比率
Medium fruit ratio/%T1(CK) 1.38±0.044 e 19.23±0.593 e 71.78±0.481 e 94.69±0.514 e T2 1.45±0.052 d 20.15±0.685 d 71.92±0.511 de 94.94±0.469 d T3 1.70±0.046 c 22.65±0.606 c 75.07±0.466 c 95.52±0.414 c T4 1.40±0.046 e 19.40±0.616 e 71.97±0.464 d 95.01±0.538 d T5 1.93±0.064 b 24.32±0.770 b 79.36±0.514 b 95.74±0.402 b T6 2.37±0.060 a 28.63±0.712 a 82.76±0.651 a 96.25±0.574 a T7 0.95±0.039 h 15.03±0.610 h 63.43±0.419 h 93.42±0.570 g T8 1.02±0.041 g 15.58±0.619 g 65.45±0.486 g 93.52±0.469 g T9 1.17±0.050 f 17.20±0.708 f 67.94±0.521 f 94.11±0.597 f 表 3 不同处理对百香果品质的影响
Table 3. Effects of treatments on quality of passion fruits
处理
Treatment可溶性固形物
Soluble solids/%总糖
Total sugar content/%总酸
Total acid content/%糖酸比
Sugar-acid ratioT1(CK) 16.24±0.509 c 7.68±0.244 d 4.29±0.058 a 1.79±0.024 e T2 16.76±0.571 b 9.45±0.328 b 3.77±0.115 b 2.51±0.142 b T3 17.42±0.568 a 9.66±0.030 a 3.07±0.028 f 3.15±0.031 a T4 16.00±0.460 d 7.68±0.021 d 4.33±0.062 a 1.78±0.027 e T5 16.04±0.476 d 8.72±0.394 c 3.60±0.240 c 2.50±0.187 b T6 17.29±0.589 a 9.67±0.033 a 3.08±0.026 f 3.14±0.025 a T7 14.36±0.580 f 6.17±0.031 g 3.28±0.032 d 1.88±0.023 c T8 14.53±0.486 f 6.65±0.033 f 3.18±0.031 e 2.09±0.024 c T9 14.73±0.543 e 6.90±0.028 e 3.05±0.029 f 2.26±0.024 c -
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