[Objectives] The aim was to reveal the distribution of soil nutrients in Se-rich area of Hainan and to clarify their specific contents, so as to provide references for the development of Se-rich area agriculture in Ha...[Objectives] The aim was to reveal the distribution of soil nutrients in Se-rich area of Hainan and to clarify their specific contents, so as to provide references for the development of Se-rich area agriculture in Hainan.[Methods] With the se-rich area in Hainan as the object, field investigation and indoor analysis were combined to elucidate the nutrient status of cultivated soil in the area and analyze its nutrient distribution.[Results] The soil in the se-rich area in Hainan province was generally acidic with the average soil pH value of 5.0. The difference in soil pH between different landforms and different altitudes was not significant, ranging from 4.9 to 5.3. Soil available P and available K contents were low to intermediate, and the soil available N content was moderate. The farming system, chemical fertilizer application structure and meteorological factors were the main causes of the distribution of soil nutrient elements. The soil exchangeable calcium and magnesium content was rich, and the distribution of trace elements in the arable soil of different terrains and elevations was closely related to the distribution of soil parent material in the region. The increase of soil organic matter content in arable land could be achieved by increasing the application of organic fertilizer and guiding the farmers to enhance the application of straws to fields.[Conclusions] The application of soil N, P and K fertilizers should be combined with the application of soil organic fertilizers to improve the soil fertility of cultivated land.展开更多
为了提高饲用苎麻营养价值,本研究采用随机区组设计,以苎麻饲用专用品种“中饲苎1号”为研究试材,通过两年大田试验和一年盆栽试验,土壤基施不同量亚硒酸钠(0、0.25、0.50、0.75和1.00 kg Se·hm-2),研究外源硒对饲用苎麻草产量、...为了提高饲用苎麻营养价值,本研究采用随机区组设计,以苎麻饲用专用品种“中饲苎1号”为研究试材,通过两年大田试验和一年盆栽试验,土壤基施不同量亚硒酸钠(0、0.25、0.50、0.75和1.00 kg Se·hm-2),研究外源硒对饲用苎麻草产量、粗蛋白、粗脂肪、粗灰分、中性洗涤纤维、酸性洗涤纤维、相对饲喂价值和营养元素硒(Se)、磷(P)、钾(K)及钙(Ca)含量的调控。结果表明,外源硒对饲用苎麻草产量无显著性影响,而对其营养价值有一定的影响,但变化幅度因施硒量、年份和刈割时间有所不同。与对照相比(0 kg Se·hm-2),0.25、0.50、0.75和1.00 kg Se·hm-2处理中2年大田试验平均粗蛋白含量分别提高1.52%、0.96%、-0.10%和-4.29%;粗脂肪含量分别下降0.25%、3.93%、1.54%和9.34%;粗灰分含量分别提高1.37%、1.23%、2.29%和0.85%;酸性洗涤纤维含量分别增加1.92%、2.15%、2.32%和3.22%;中性洗涤纤维含量变幅分别为-2.97%、-0.97%、2.01%和2.63%;相对饲喂价值变幅分别为1.74%、-0.103%、-3.14%和-4.30%;Ca含量变幅分别为0.07%、-2.01%、1.27%和-0.59%;P含量分别提高7.26%、7.68%、4.63%和4.54%;K含量分别变幅分别为4.59%、12.31%、-2.04%和2.83%;Se含量随着施硒量的增加逐渐增加,最高可达到2.07 mg·kg-1。通过主成分分析结合模糊数学中隶属函数法综合评价表明,0.25~0.50 kg Se·hm-2为该地区效果最佳施硒量,有利于提高饲用苎麻的营养价值。展开更多
基金Supported by the Special Project for the Reform of Scientific Research Organization for No-profits(pzsfyl-201812)
文摘[Objectives] The aim was to reveal the distribution of soil nutrients in Se-rich area of Hainan and to clarify their specific contents, so as to provide references for the development of Se-rich area agriculture in Hainan.[Methods] With the se-rich area in Hainan as the object, field investigation and indoor analysis were combined to elucidate the nutrient status of cultivated soil in the area and analyze its nutrient distribution.[Results] The soil in the se-rich area in Hainan province was generally acidic with the average soil pH value of 5.0. The difference in soil pH between different landforms and different altitudes was not significant, ranging from 4.9 to 5.3. Soil available P and available K contents were low to intermediate, and the soil available N content was moderate. The farming system, chemical fertilizer application structure and meteorological factors were the main causes of the distribution of soil nutrient elements. The soil exchangeable calcium and magnesium content was rich, and the distribution of trace elements in the arable soil of different terrains and elevations was closely related to the distribution of soil parent material in the region. The increase of soil organic matter content in arable land could be achieved by increasing the application of organic fertilizer and guiding the farmers to enhance the application of straws to fields.[Conclusions] The application of soil N, P and K fertilizers should be combined with the application of soil organic fertilizers to improve the soil fertility of cultivated land.
文摘为了提高饲用苎麻营养价值,本研究采用随机区组设计,以苎麻饲用专用品种“中饲苎1号”为研究试材,通过两年大田试验和一年盆栽试验,土壤基施不同量亚硒酸钠(0、0.25、0.50、0.75和1.00 kg Se·hm-2),研究外源硒对饲用苎麻草产量、粗蛋白、粗脂肪、粗灰分、中性洗涤纤维、酸性洗涤纤维、相对饲喂价值和营养元素硒(Se)、磷(P)、钾(K)及钙(Ca)含量的调控。结果表明,外源硒对饲用苎麻草产量无显著性影响,而对其营养价值有一定的影响,但变化幅度因施硒量、年份和刈割时间有所不同。与对照相比(0 kg Se·hm-2),0.25、0.50、0.75和1.00 kg Se·hm-2处理中2年大田试验平均粗蛋白含量分别提高1.52%、0.96%、-0.10%和-4.29%;粗脂肪含量分别下降0.25%、3.93%、1.54%和9.34%;粗灰分含量分别提高1.37%、1.23%、2.29%和0.85%;酸性洗涤纤维含量分别增加1.92%、2.15%、2.32%和3.22%;中性洗涤纤维含量变幅分别为-2.97%、-0.97%、2.01%和2.63%;相对饲喂价值变幅分别为1.74%、-0.103%、-3.14%和-4.30%;Ca含量变幅分别为0.07%、-2.01%、1.27%和-0.59%;P含量分别提高7.26%、7.68%、4.63%和4.54%;K含量分别变幅分别为4.59%、12.31%、-2.04%和2.83%;Se含量随着施硒量的增加逐渐增加,最高可达到2.07 mg·kg-1。通过主成分分析结合模糊数学中隶属函数法综合评价表明,0.25~0.50 kg Se·hm-2为该地区效果最佳施硒量,有利于提高饲用苎麻的营养价值。
