| Effects of a new type of soil amendment on physical and chemical properties of soda alkali-saline soil and yield of the rice |
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| DOI：10.7606/j.issn.1000-7601.2018.01.09 |
| Key Words: soda alkali-saline soil soil amendment rice yield soil column leaching |
| Author Name | Affiliation | | DONG Wei | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | DU Xue-jun | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | WANG Dong | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | WANG Shun-yi | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | FENG Hao-jie | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | REN Xue-qin | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China | | HU Shu-wen | College of Resources and Environmental Science, China Agricultural University, Beijing 10093, China |
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| Abstract: |
| To determine the effects of new soil amendment on alkaline soils improvement in a short time, we selected the optimum amendment application rate in field. The study performed four treatments of amendment application levels, 0, 5, 7.5, 15 t·hm-2, defined as A0, A1, A2, A3 respectively. With a combining field experiment and simulation of soil column leaching, soil pH, total dissolved salt content, alkalization degree, characteristic of soil nutrient transformation and rice yield were measured under different amendment application rates. The results indicated that all the amendment treatments significantly decreased 0～40 cm soil pH, total dissolved salt content and Na+ content (P<0.05), and this trend diminished with amendment application levels. In field, application of amendment reduced soil alkalization from 34.55% to 18.20%, with a significant decrease in SOM and Olsen-P. After the improvement of soil, percentage of blighted grain dramatically reduced while tillering amount and earring amount and particles weight increased. Particularly, the rice yield was increased by nearly three times (290.8%) in A2 treatment. Collectively, the optimum application rate of this new amendment is proposed as being 7.5 t·hm-2. |
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