首先，这里有一点关于我的实验设计。我操纵冬季和夏季降水的方式是每个冬季子图在夏季情节中嵌套。然后我有三个重复（块）。我在不同日期的每个子图的相同区域进行了植物群落测量。我想确保我正确地考虑我的随机效应，其中块是随机的，子图嵌套在图中，并且重复测量。我已经尝试查找有关如何正确执行此操作的多个响应，但已经缩短了。
在这一点上，我已经提出这个模型是最好的，但我不认为它解释了重复的措施方面。
lmer(Percent.cover~Winter*Summer*Month*Year * species + (1|Block) + (1|Plot/Subplot), data = data)
这是一些模拟数据：
Year Block Plot Subplot Winter Summer Month species Percent.cover
1 2015 1 3 C Dry Wet Jun Clear.Weed 18
2 2015 1 3 A Wet Wet Jun Clear.Weed 1
3 2015 1 3 B Control Wet Jun Clear.Weed 47
4 2015 1 2 C Wet Dry Jun Clear.Weed 22
5 2015 1 2 A Dry Dry Jun Clear.Weed 8
6 2015 1 2 B Control Dry Jun Clear.Weed 37
7 2015 1 1 C Control Control Jun Clear.Weed 37
8 2015 1 1 B Wet Control Jun Clear.Weed 44
9 2015 1 1 A Dry Control Jun Clear.Weed 33
10 2015 3 3 A Control Wet Jun Clear.Weed 16
11 2015 3 3 B Wet Wet Jun Clear.Weed 43
12 2015 3 3 C Dry Wet Jun Clear.Weed 35
13 2015 3 2 C Wet Control Jun Clear.Weed 45
14 2015 3 2 A Dry Control Jun Clear.Weed 35
15 2015 3 2 B Control Control Jun Clear.Weed 11
16 2015 3 1 C Dry Dry Jun Clear.Weed 31
17 2015 3 1 A Control Dry Jun Clear.Weed 8
18 2015 3 1 B Wet Dry Jun Clear.Weed 42
19 2015 2 3 C Control Control Jun Clear.Weed 43
20 2015 2 3 A Wet Control Jun Clear.Weed 46
21 2015 2 3 B Dry Control Jun Clear.Weed 12
22 2015 2 2 C Dry Wet Jun Clear.Weed 39
23 2015 2 2 A Control Wet Jun Clear.Weed 19
24 2015 2 2 B Wet Wet Jun Clear.Weed 28
25 2015 2 1 C Control Dry Jun Clear.Weed 33
26 2015 2 1 A Wet Dry Jun Clear.Weed 10
27 2015 2 1 B Dry Dry Jun Clear.Weed 13
28 2015 1 3 C Dry Wet Sep Clear.Weed 42
29 2015 1 3 B Control Wet Sep Clear.Weed 40
30 2015 1 3 A Wet Wet Sep Clear.Weed 26
31 2015 1 2 A Dry Dry Sep Clear.Weed 22
32 2015 1 2 B Control Dry Sep Clear.Weed 31
33 2015 1 2 C Wet Dry Sep Clear.Weed 13
34 2015 1 1 A Dry Control Sep Clear.Weed 15
35 2015 1 1 C Control Control Sep Clear.Weed 34
36 2015 1 1 B Wet Control Sep Clear.Weed 26
37 2015 2 3 A Control Control Sep Clear.Weed 47
38 2015 2 3 B Dry Control Sep Clear.Weed 21
39 2015 2 3 C Wet Control Sep Clear.Weed 4
40 2015 2 2 A Control Wet Sep Clear.Weed 44
41 2015 2 2 B Wet Wet Sep Clear.Weed 31
42 2015 2 2 C Dry Wet Sep Clear.Weed 9
43 2015 2 1 C Control Dry Sep Clear.Weed 49
44 2015 2 1 A Wet Dry Sep Clear.Weed 45
45 2015 2 1 B Dry Dry Sep Clear.Weed 31
46 2015 3 3 B Wet Wet Sep Clear.Weed 9
47 2015 3 3 C Dry Wet Sep Clear.Weed 10
48 2015 3 3 A Control Wet Sep Clear.Weed 19
49 2015 3 2 B Control Control Sep Clear.Weed 43
50 2015 3 2 C Wet Control Sep Clear.Weed 5
51 2015 3 2 A Dry Control Sep Clear.Weed 6
52 2015 3 1 C Dry Dry Sep Clear.Weed 10
53 2015 3 1 B Wet Dry Sep Clear.Weed 2
54 2015 3 1 A Control Dry Sep Clear.Weed 25
55 2016 1 3 C Dry Wet Jun Clear.Weed 18
56 2016 1 3 A Wet Wet Jun Clear.Weed 48
57 2016 1 3 B Control Wet Jun Clear.Weed 35
58 2016 1 2 C Wet Dry Jun Clear.Weed 1
59 2016 1 2 A Dry Dry Jun Clear.Weed 10
60 2016 1 2 B Control Dry Jun Clear.Weed 12
61 2016 1 1 C Control Control Jun Clear.Weed 8
62 2016 1 1 B Wet Control Jun Clear.Weed 25
63 2016 1 1 A Dry Control Jun Clear.Weed 49
64 2016 3 3 A Control Wet Jun Clear.Weed 16
65 2016 3 3 B Wet Wet Jun Clear.Weed 19
66 2016 3 3 C Dry Wet Jun Clear.Weed 5
67 2016 3 2 C Wet Control Jun Clear.Weed 1
68 2016 3 2 A Dry Control Jun Clear.Weed 15
69 2016 3 2 B Control Control Jun Clear.Weed 21
70 2016 3 1 C Dry Dry Jun Clear.Weed 48
71 2016 3 1 A Control Dry Jun Clear.Weed 27
72 2016 3 1 B Wet Dry Jun Clear.Weed 7
73 2016 2 3 C Control Control Jun Clear.Weed 29
74 2016 2 3 A Wet Control Jun Clear.Weed 7
75 2016 2 3 B Dry Control Jun Clear.Weed 36
76 2016 2 2 A Control Wet Jun Clear.Weed 6
77 2016 2 2 C Dry Wet Jun Clear.Weed 45
78 2016 2 2 B Wet Wet Jun Clear.Weed 38
79 2016 2 1 C Control Dry Jun Clear.Weed 22
80 2016 2 1 A Wet Dry Jun Clear.Weed 48
81 2016 2 1 B Dry Dry Jun Clear.Weed 46
82 2016 1 3 C Dry Wet Sep Clear.Weed 39
83 2016 1 3 A Wet Wet Sep Clear.Weed 41
84 2016 1 3 B Control Wet Sep Clear.Weed 27
85 2016 1 2 C Wet Dry Sep Clear.Weed 46
86 2016 1 2 A Dry Dry Sep Clear.Weed 32
87 2016 1 2 B Control Dry Sep Clear.Weed 21
88 2016 1 1 C Control Control Sep Clear.Weed 28
89 2016 1 1 B Wet Control Sep Clear.Weed 35
90 2016 1 1 A Dry Control Sep Clear.Weed 23
91 2016 3 3 A Control Wet Sep Clear.Weed 8
92 2016 3 3 B Wet Wet Sep Clear.Weed 46
93 2016 3 3 C Dry Wet Sep Clear.Weed 48
94 2016 3 2 C Wet Control Sep Clear.Weed 24
95 2016 3 2 A Dry Control Sep Clear.Weed 4
96 2016 3 2 B Control Control Sep Clear.Weed 39
97 2016 3 1 C Dry Dry Sep Clear.Weed 26
98 2016 3 1 A Control Dry Sep Clear.Weed 47
99 2016 3 1 B Wet Dry Sep Clear.Weed 12
100 2016 2 3 C Control Control Sep Clear.Weed 11
101 2016 2 3 A Wet Control Sep Clear.Weed 38
102 2016 2 3 B Dry Control Sep Clear.Weed 19
103 2016 2 2 C Dry Wet Sep Clear.Weed 18
104 2016 2 2 B Wet Wet Sep Clear.Weed 14
105 2016 2 1 C Control Dry Sep Clear.Weed 17
106 2016 2 1 A Wet Dry Sep Clear.Weed 34
107 2016 2 1 B Dry Dry Sep Clear.Weed 15
108 2015 1 3 C Dry Wet Jun Black.Snake.Root 11
109 2015 1 3 A Wet Wet Jun Black.Snake.Root 29
110 2015 1 3 B Control Wet Jun Black.Snake.Root 0
111 2015 1 2 C Wet Dry Jun Black.Snake.Root 0
112 2015 1 2 A Dry Dry Jun Black.Snake.Root 16
113 2015 1 2 B Control Dry Jun Black.Snake.Root 41
114 2015 1 1 C Control Control Jun Black.Snake.Root 4
115 2015 1 1 B Wet Control Jun Black.Snake.Root 26
116 2015 1 1 A Dry Control Jun Black.Snake.Root 4
117 2015 3 3 A Control Wet Jun Black.Snake.Root 2
118 2015 3 3 B Wet Wet Jun Black.Snake.Root 30
119 2015 3 3 C Dry Wet Jun Black.Snake.Root 34
120 2015 3 2 C Wet Control Jun Black.Snake.Root 4
121 2015 3 2 A Dry Control Jun Black.Snake.Root 4
122 2015 3 2 B Control Control Jun Black.Snake.Root 45
123 2015 3 1 C Dry Dry Jun Black.Snake.Root 44
124 2015 3 1 A Control Dry Jun Black.Snake.Root 2
125 2015 3 1 B Wet Dry Jun Black.Snake.Root 34
126 2015 2 3 C Control Control Jun Black.Snake.Root 19
127 2015 2 3 A Wet Control Jun Black.Snake.Root 14
128 2015 2 3 B Dry Control Jun Black.Snake.Root 19
129 2015 2 2 C Dry Wet Jun Black.Snake.Root 37
130 2015 2 2 A Control Wet Jun Black.Snake.Root 42
131 2015 2 2 B Wet Wet Jun Black.Snake.Root 46
132 2015 2 1 C Control Dry Jun Black.Snake.Root 20
133 2015 2 1 A Wet Dry Jun Black.Snake.Root 24
134 2015 2 1 B Dry Dry Jun Black.Snake.Root 7
135 2015 1 3 C Dry Wet Sep Black.Snake.Root 19
136 2015 1 3 B Control Wet Sep Black.Snake.Root 24
137 2015 1 3 A Wet Wet Sep Black.Snake.Root 43
138 2015 1 2 A Dry Dry Sep Black.Snake.Root 36
139 2015 1 2 B Control Dry Sep Black.Snake.Root 21
140 2015 1 2 C Wet Dry Sep Black.Snake.Root 41
141 2015 1 1 A Dry Control Sep Black.Snake.Root 36
142 2015 1 1 C Control Control Sep Black.Snake.Root 16
143 2015 1 1 B Wet Control Sep Black.Snake.Root 49
144 2015 2 3 A Control Control Sep Black.Snake.Root 29
145 2015 2 3 B Dry Control Sep Black.Snake.Root 13
146 2015 2 3 C Wet Control Sep Black.Snake.Root 32
147 2015 2 2 A Control Wet Sep Black.Snake.Root 39
148 2015 2 2 B Wet Wet Sep Black.Snake.Root 23
149 2015 2 2 C Dry Wet Sep Black.Snake.Root 18
150 2015 2 1 C Control Dry Sep Black.Snake.Root 5
151 2015 2 1 A Wet Dry Sep Black.Snake.Root 46
152 2015 2 1 B Dry Dry Sep Black.Snake.Root 1
153 2015 3 3 B Wet Wet Sep Black.Snake.Root 19
154 2015 3 3 C Dry Wet Sep Black.Snake.Root 44
155 2015 3 3 A Control Wet Sep Black.Snake.Root 7
156 2015 3 2 B Control Control Sep Black.Snake.Root 12
157 2015 3 2 C Wet Control Sep Black.Snake.Root 19
158 2015 3 2 A Dry Control Sep Black.Snake.Root 31
159 2015 3 1 C Dry Dry Sep Black.Snake.Root 21
160 2015 3 1 B Wet Dry Sep Black.Snake.Root 33
161 2015 3 1 A Control Dry Sep Black.Snake.Root 30
162 2016 1 3 C Dry Wet Jun Black.Snake.Root 14
163 2016 1 3 A Wet Wet Jun Black.Snake.Root 0
164 2016 1 3 B Control Wet Jun Black.Snake.Root 33
165 2016 1 2 C Wet Dry Jun Black.Snake.Root 37
166 2016 1 2 A Dry Dry Jun Black.Snake.Root 15
167 2016 1 2 B Control Dry Jun Black.Snake.Root 29
168 2016 1 1 C Control Control Jun Black.Snake.Root 4
169 2016 1 1 B Wet Control Jun Black.Snake.Root 28
170 2016 1 1 A Dry Control Jun Black.Snake.Root 49
171 2016 3 3 A Control Wet Jun Black.Snake.Root 43
172 2016 3 3 B Wet Wet Jun Black.Snake.Root 19
173 2016 3 3 C Dry Wet Jun Black.Snake.Root 5
174 2016 3 2 C Wet Control Jun Black.Snake.Root 19
175 2016 3 2 A Dry Control Jun Black.Snake.Root 27
176 2016 3 2 B Control Control Jun Black.Snake.Root 18
177 2016 3 1 C Dry Dry Jun Black.Snake.Root 49
178 2016 3 1 A Control Dry Jun Black.Snake.Root 32
179 2016 3 1 B Wet Dry Jun Black.Snake.Root 41
180 2016 2 3 C Control Control Jun Black.Snake.Root 1
181 2016 2 3 A Wet Control Jun Black.Snake.Root 13
182 2016 2 3 B Dry Control Jun Black.Snake.Root 45
183 2016 2 2 A Control Wet Jun Black.Snake.Root 50
184 2016 2 2 C Dry Wet Jun Black.Snake.Root 26
185 2016 2 2 B Wet Wet Jun Black.Snake.Root 17
186 2016 2 1 C Control Dry Jun Black.Snake.Root 38
187 2016 2 1 A Wet Dry Jun Black.Snake.Root 2
188 2016 2 1 B Dry Dry Jun Black.Snake.Root 18
189 2016 1 3 C Dry Wet Sep Black.Snake.Root 31
190 2016 1 3 A Wet Wet Sep Black.Snake.Root 33
191 2016 1 3 B Control Wet Sep Black.Snake.Root 2
192 2016 1 2 C Wet Dry Sep Black.Snake.Root 29
193 2016 1 2 A Dry Dry Sep Black.Snake.Root 12
194 2016 1 2 B Control Dry Sep Black.Snake.Root 2
195 2016 1 1 C Control Control Sep Black.Snake.Root 7
196 2016 1 1 B Wet Control Sep Black.Snake.Root 14
197 2016 1 1 A Dry Control Sep Black.Snake.Root 44
198 2016 3 3 A Control Wet Sep Black.Snake.Root 12
199 2016 3 3 B Wet Wet Sep Black.Snake.Root 44
200 2016 3 3 C Dry Wet Sep Black.Snake.Root 46
201 2016 3 2 C Wet Control Sep Black.Snake.Root 9
202 2016 3 2 A Dry Control Sep Black.Snake.Root 48
203 2016 3 2 B Control Control Sep Black.Snake.Root 9
204 2016 3 1 C Dry Dry Sep Black.Snake.Root 20
205 2016 3 1 A Control Dry Sep Black.Snake.Root 7
206 2016 3 1 B Wet Dry Sep Black.Snake.Root 9
207 2016 2 3 C Control Control Sep Black.Snake.Root 37
208 2016 2 3 A Wet Control Sep Black.Snake.Root 16
209 2016 2 3 B Dry Control Sep Black.Snake.Root 16
210 2016 2 2 C Dry Wet Sep Black.Snake.Root 18
211 2016 2 2 B Wet Wet Sep Black.Snake.Root 2
212 2016 2 1 C Control Dry Sep Black.Snake.Root 13
213 2016 2 1 A Wet Dry Sep Black.Snake.Root 46
214 2016 2 1 B Dry Dry Sep