Crops ›› 2017, Vol. 33 ›› Issue (1): 94-99.doi: 10.16035/j.issn.1001-7283.2017.01.018

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Effects of Bacterial Manure and Nitrogen and Phosphorus Fertilizer Combination on Drought Resistance Physiological Indexes and Yield of Potato under Plastic-Mulching

Xu Chang,Liu Jinghui,Yang Yanming,Bai Xue,Ma Bin,Zhang Xinglong,Sun Mengyuan,Zhang Mengyu   

  1. Agricultural College,Inner Mongolia Agricultural University,Hohhot 010019,Inner Mongolia,China
  • Received:2016-09-20 Revised:2016-12-08 Online:2017-02-15 Published:2018-08-26

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Abstract:

A field experiment was conducted to study the effects of mixed application of bacterial manure with nitrogen and phosphorus fertilizers on drought resistance physiological indexes and yield of potato under the condition of covering plastic film using Kexin 1 as the experimental cultivar. Results showed that bacterial manure could improve rhizosphere soil moisture content and root activity, but decrease the content of MDA and Pro, and activities of SOD and POD. T1(urea 37.5kg/hm 2+diammonium phosphate 225kg/hm 2+bacterial manure 750kg/hm 2) was the best treatment which increased yield by 21.05% than CK (urea 37.5kg/hm 2+diammonium phosphate 225kg/hm 2). Mixed application of bacterial manure and nitrogen and phosphorus fertilizers could alleviate the impact of the drought on potato growth and development, improve tuber yield and economic benefit.

Key words: Bio-bacterial manure, Nitrogen and phosphorus fertilizers, Potato, Physidogical indexes relative to drought resistance, Yield

Table 1

Tests of the manure treatment combination and fertilizer use kg/hm2"

处理Treatment 磷酸二铵Diammonium phosphate 尿素Urea 马铃薯专用肥Special fertilizer for potato 微生物菌肥Bacterial manure
对照（CK） 450 75.0 — —
T1 225 37.5 — 750
T2 — — 600 —
T3 — — 300 750

Fig.1

Effects of different fertilizer combinations on the soil moisture content"

Fig.2

Effects of different fertilizer combinations on the leaf SOD activity Different letters mean significant difference at 0.05 probability level, the same below"

Fig.3

Effects of different fertilizer combinations on leaf POD activity"

Fig.4

Effects of different fertilizer combinations on leaf MDA content"

Fig.5

Effects of different fertilizer combinations on leaf free proline content"

Fig.6

Effects of different fertilizer combinations on the root activity"

Table 2

Effects of different fertilizer combinations on potato yield and economic benefit"

处理Treatment 产量Yield (t/hm2) 商品薯率Commercial tuber rate (%) 小薯率Small tuber rate (%) 经济效益Economic benefit (元/hm2)
CK 13.3bc 82.38c 17.62a 4 987
T1 16.1a 90.61a 9.39c 7 030
T2 13.5b 85.14bc 14.86ab 5 033
T3 14.7ab 87.51b 12.49bc 5 615

Table 3

Correlation analysis between physiological and biochemical indexes and yield in potato tuber expansion stage"

指标Index MDA含量
MDA content		 SOD活性
SOD activity		 POD活性
POD activity		 根系活力
Root activity		 游离Pro含量
Free proline content		 产量
Yield
MDA含量 1.0000
SOD活性 -0.2989 1
POD活性 -0.6104* 0.8381** 1
根系活力 -0.4292 0.0441 0.2344 1
游离Pro含量 0.0268 -0.1656 -0.5566 0.5085 1
产量 -0.6269* 0.1358 0.8424** 0.6469** 0.0385 1
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