The mudflats along the East Coast of China can be important alternative sources for arable lands if amended by large amount of organic fertilizers. Rich in organic matter and other nutrients, dairy manure has been considered as the economic choice for an initial fertility driver. Therefore, the goal of this study was to evaluate the impact of dairy manure amendment (DMA) as an initial fertility driver at application rates of 0, 30, 75, 150, and 300 t ha–1 on soil physicochemical properties, biomass and growth of ryegrass (Lolium perenne L.) grown in mudflat soil. The results showed that the DMA decreased soil bulk density in comparison to the unamended soil. The organic matter (OM) content in mudflat soil increased with increasing DMA rates. The salinity of mudflat soil decreased with increasing DMA rates, and the salinity at 30, 75, 150 and 300 t ha–1 DMA rates, corresponded to decreases of 26.1%, 35.8%, 37.8% and 45.4%, compared to 8.63 g kg–1 in the unamended soil. Electric conductivity (EC) of mudflat soil decreased with increasing DMA rate, while cation exchange capacity (CEC) increased duo to DMA. The contents of total N, total P, alkaline N, and available P in mudflat soil increased with increasing DMA rates. The increment of green herbage yield of ryegrass at 210 DAS at 30, 75, 150, and 300 t ha–1 DMA rates were 257.7%, 303.5%, 414.8%, and 516.6%, compared to the unamended soil (p 0.05). Soil total Cu and Zn increased while total Mn, Ni, and Cr remained unchanged in response to DMA due to the high Cu and Zn content in the dairy manure. However, The DMA increased most of available metals except for Ni. In summary, land application of dairy manure as initial fertility driver could be an effective and safe way to amend mudflat soil, due to the rapid development of soil initial fertility, which enhanced green manure ryegrass (Lolium perenne L.) growth.
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机译：如果大量添加有机肥料，中国东海岸的滩涂可以成为耕地的重要替代来源。富含有机质和其他营养素的奶牛粪被认为是最初推动生育的经济选择。因此，本研究的目的是评估0、30、75、150和300 t ha-1施用量下作为初始肥力的乳牛粪便改良剂（DMA）对土壤理化性质，生物量和生长的影响。泥质土壤中生长的黑麦草（黑麦草）。结果表明，与未改良土壤相比，DMA降低了土壤容重。随着DMA速率的增加，滩涂土壤中的有机质（OM）含量增加。随着DMA速率的增加，滩涂土壤的盐度降低，而在30、75、150和300 t ha-1 DMA速率下的盐度分别比8.63 g kg分别降低了26.1％，35.8％，37.8％和45.4％。 –1在未改良的土壤中。随着DMA速率的增加，滩涂土壤的电导率（EC）降低，而阳离子交换容量（CEC）则比DMA高。随着DMA速率的增加，滩涂土壤中的总氮，总磷，碱性氮和有效磷的含量均增加。与未改良的土壤相比，在210 DAS下30、75、150和300 t ha-1的DMA下，黑麦草的绿色牧草产量增加了257.7％，303.5％，414.8％和516.6％（p <0.05） 。由于DMA中的铜和锌含量高，土壤的总铜和锌增加，而总锰，镍和铬保持不变。但是，DMA增加了除Ni之外的大多数可用金属。总而言之，由于土壤初始肥力的快速发展提高了绿色粪肥黑麦草（黑麦草）的生长，将乳肥作为初始肥力的驱动器的土地应用可能是一种有效且安全的方法来修正泥泞的土壤。
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