玉米秸粉与草木樨颗粒料饲喂生长兔对比试验

用玉米秸粉与草木樨粉各占30%的颗粒料进行了饲喂生长兔对比试验。饲养试验结果,生产性能没有明显差别;消化试验结果,能量及主要营养成分消化率相近。饲喂含30%玉米秸粉的颗粒料可使每 Kg 增重的饲料费用降低23.3%。说明玉米秸粉用于家兔日粮是可行的。     

不同土壤改良剂对大豆富集重金属的影响

在广西环江开展了土壤改良剂对大豆富集重金属的影响研究,结果表明:土壤改良剂(煤灰、菌渣、蚕沙)均能在大豆苗期、结荚期和成熟期有效降低大豆中重金属含量。菌渣对大豆苗期重金属抑制效果最好,蚕沙对成熟期重金属吸收的抑制效果最佳,而煤灰在结荚期抑制重金属效果优于其他的改良剂,并且对减少大豆籽粒中重金属含量作用效果最好。     

麦茬稻壮秧稀植最化指标与配套技术

对麦茬稻进行了品种、密度、育秧、施肥、喷剂试验。结果表明，壮身稀植与高穗重品种、N素V字施肥是统一的。提出高产理想株型、稀植程度和产量结构，肯定了湿润育秧方式，证实了N、P、K、Zn配合、施Si、喷胆碱复合物和水稻微肥的增产作用。     

Effect of Thermal Energy Intensity on Time and Rate of Nitrogen Accumulation by Maize (Zea mays L.)1

The effect of thermal energy intensity (TEI) on the rate of nitrogen (N) accumulation by maize from a Hamerly clay loam soil (Aerie Calciaquoll) was examined with and without supplemental irrigation. Soil- and air-TEI expressed as cumulative growing degree days (GDD) was determined from hourly temperature measurements taken within each plot at soil depths of 0.05-, 0.15-, and 0.3-m and at a height of 1.2-m above ground surface. A daily mean TEI (GDD per day) was calculated for each growth period. Estimates of time coefficient(s), k, in uni- and diphasic tanh[k(time)] functions, plotted against mean TEI for the periods; 1) planting to emergence, 2) emergence to eighth leaf, 3) eighth leaf to time(s) of maximum N accumulation rate, (t₀), 4) planting to t₀, 5) emergence to t₀, 6) first diphasic maximum accumulation rate (t₀₁) to 50 % silking, and 7) silking to second diphasic maximum accumulation rate t₀₂ showed several linear relationships. Uniphasic time coefficients were modelled as functions of air-TEI. The first diphasic time coefficient, k₁ was modelled as a function of pre- and post-emergent soil-TEI. Attempts to model k₂, the second time coefficient of the diphasic model were unsuccessful; however, this time coefficient was linearly related to TEI for the growth period ‘t₀₁, to 50 % silking’ and curvilinearly related to k₁.     

饲用~(15)N标记绿肥在猪体内氮转化和代谢规律的研究

应用~(15)N标记绿肥饲喂生长猪,探讨猪对绿肥中氮素的消化、吸收、排泄和转化规律。结果证明:(1)饲料绿肥中的~(15)N平均有23.51％被猪体各组织器官消化吸收,有23.85％由粪中排出,有28.76％由尿中排出,总回收率平均为76.12％,损失率为23.88％。(2)猪对日粮中各种氨基酸总量的消化率平均为60.45％。     

地膜植棉喷灌技术研究

根据内陆干旱区的特点，为了充分发挥喷灌节水增产优势，本文提出地膜植棉喷灌技术、干播湿出及栽培配套措施。     

吕梁山区引种日本落叶松的苗期生长效应

通过对吕梁林区引种日本落叶松苗期生长效应的初步研究，日本落叶松苗期生长良好，越冬顺利，可作为该区很有希望的引种树种之一。     

日粮蛋白质水平对生长期闽南黄牛氮代谢的影响

选用9头14月龄闽南黄牛公牛,按重复3×3拉丁方设计,进行了氮平衡试验。研究了日粮蛋白质水平对氮消化与沉积规律及血液某些相关指标的影响。结果表明:随着蛋白质水平的提高,氮的进食量显著增加;氮的表观消化率、氮沉积量也显著增加(P<0.01)。氮的表观消化率(％)=43.26+0.58X,(r=0.9412,n=9);沉积氮(g/d)=1.86+0.37X,(r=0.9216,n=9)。     

长生公猪维持能量需要的研究

用6头约克夏和10头汉普夏、杜洛克、丹麦伦德瑞斯共36头小公猪,在其20—100kg 生长阶段内分期进行氮—碳平衔试验和呼吸测热试验各180头次。结果表明,生长公猪每千克代谢体重(W~(0.75))所需的维持能量与体重的一定的幂的倒数成比例。当代谢能转化为体蛋白质能和体脂肪能的效率[k_p和k_f]为0.60和0.80,0.68和0.75,0.56和0.74时,每千克代谢体重所需的维持能量分别为1131W~(-0.20),1307W~(-0.23)和1235W~(-0.25)千焦代谢能或1173W~(-0.20),1356W~(-0.23)和1281W~(-0.25)千焦消化能。建议用 ME_m,KJ/W~(0.75),kg=1307W~(-0.23),kg 作为生长公猪维持需要的公式。     

水稻保墒旱直播栽培技术规程

从选地、整地、播种、施肥、水层管理、病虫害防治等方面对水稻保墒旱直播主要栽培技术进行了系统总结。